541057981 has 2 divisors, whose sum is σ = 541057982. Its totient is φ = 541057980.

The previous prime is 541057943. The next prime is 541057991. The reversal of 541057981 is 189750145.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393824025 + 147233956 = 19845^2 + 12134^2 .

It is a cyclic number.

It is not a de Polignac number, because 541057981 - 2²⁹ = 4187069 is a prime.

It is a super-2 number, since 2×541057981² = 585487477607592722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541057931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270528990 + 270528991.

It is an arithmetic number, because the mean of its divisors is an integer number (270528991).

Almost surely, 2^541057981 is an apocalyptic number.

It is an amenable number.

541057981 is a deficient number, since it is larger than the sum of its proper divisors (1).

541057981 is an equidigital number, since it uses as much as digits as its factorization.

541057981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 541057981 is about 23260.6530647787. The cubic root of 541057981 is about 814.8567532751.

The spelling of 541057981 in words is "five hundred forty-one million, fifty-seven thousand, nine hundred eighty-one".