541380781 has 4 divisors (see below), whose sum is σ = 556012732. Its totient is φ = 526748832.

The previous prime is 541380761. The next prime is 541380799. The reversal of 541380781 is 187083145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187083145 = 5 ⋅37416629.

It can be written as a sum of positive squares in 2 ways, for example, as 212284900 + 329095881 = 14570^2 + 18141^2 .

It is a cyclic number.

It is not a de Polignac number, because 541380781 - 2¹⁹ = 540856493 is a prime.

It is a super-2 number, since 2×541380781² = 586186300072339922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 14631913 = 541380781 / (5 + 4 + 1 + 3 + 8 + 0 + 7 + 8 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 541380781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541380701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7315920 + ... + 7315993.

It is an arithmetic number, because the mean of its divisors is an integer number (139003183).

Almost surely, 2^541380781 is an apocalyptic number.

It is an amenable number.

541380781 is a deficient number, since it is larger than the sum of its proper divisors (14631951).

541380781 is a wasteful number, since it uses less digits than its factorization.

541380781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14631950.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 541380781 is about 23267.5907863277. The cubic root of 541380781 is about 815.0187713192.

The spelling of 541380781 in words is "five hundred forty-one million, three hundred eighty thousand, seven hundred eighty-one".