56081331 has 48 divisors (see below), whose sum is σ = 90604800. Its totient is φ = 33276096.

The previous prime is 56081321. The next prime is 56081341. The reversal of 56081331 is 13318065.

It is an interprime number because it is at equal distance from previous prime (56081321) and next prime (56081341).

It is not a de Polignac number, because 56081331 - 2⁹ = 56080819 is a prime.

It is a super-2 number, since 2×56081331² = 6290231373463122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56081295 and 56081304.

It is not an unprimeable number, because it can be changed into a prime (56081321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213106 + ... + 213368.

It is an arithmetic number, because the mean of its divisors is an integer number (1887600).

Almost surely, 2^56081331 is an apocalyptic number.

56081331 is a deficient number, since it is larger than the sum of its proper divisors (34523469).

56081331 is a wasteful number, since it uses less digits than its factorization.

56081331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 56081331 is about 7488.7469579363. The cubic root of 56081331 is about 382.7713619689.

Adding to 56081331 its reverse (13318065), we get a palindrome (69399396).

The spelling of 56081331 in words is "fifty-six million, eighty-one thousand, three hundred thirty-one".