540881931 has 8 divisors (see below), whose sum is σ = 722994064. Its totient is φ = 359678880.

The previous prime is 540881909. The next prime is 540881941. The reversal of 540881931 is 139188045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-540881931 is a prime.

It is a super-2 number, since 2×540881931² = 585106526564577522, which contains 22 as substring.

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 540881931.

It is not an unprimeable number, because it can be changed into a prime (540881941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225880 + ... + 228261.

It is an arithmetic number, because the mean of its divisors is an integer number (90374258).

Almost surely, 2^540881931 is an apocalyptic number.

540881931 is a deficient number, since it is larger than the sum of its proper divisors (182112133).

540881931 is a wasteful number, since it uses less digits than its factorization.

540881931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454541.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 540881931 is about 23256.8684693361. The cubic root of 540881931 is about 814.7683640460.

The spelling of 540881931 in words is "five hundred forty million, eight hundred eighty-one thousand, nine hundred thirty-one".