53790581 has 4 divisors (see below), whose sum is σ = 57928332. Its totient is φ = 49652832.

The previous prime is 53790571. The next prime is 53790589. The reversal of 53790581 is 18509735.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7672900 + 46117681 = 2770^2 + 6791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53790581 is a prime.

It is a super-2 number, since 2×53790581² = 5786853208635122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53790589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068856 + ... + 2068881.

It is an arithmetic number, because the mean of its divisors is an integer number (14482083).

Almost surely, 2^53790581 is an apocalyptic number.

It is an amenable number.

53790581 is a deficient number, since it is larger than the sum of its proper divisors (4137751).

53790581 is a wasteful number, since it uses less digits than its factorization.

53790581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137750.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 53790581 is about 7334.2062283522. The cubic root of 53790581 is about 377.4870682528.

The spelling of 53790581 in words is "fifty-three million, seven hundred ninety thousand, five hundred eighty-one".