56157331 has 8 divisors (see below), whose sum is σ = 60555600. Its totient is φ = 51903360.

The previous prime is 56157317. The next prime is 56157359. The reversal of 56157331 is 13375165.

56157331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 56157331 - 2¹¹ = 56155283 is a prime.

It is a super-2 number, since 2×56157331² = 6307291650087122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56157293 and 56157302.

It is not an unprimeable number, because it can be changed into a prime (56157301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35266 + ... + 36823.

It is an arithmetic number, because the mean of its divisors is an integer number (7569450).

Almost surely, 2^56157331 is an apocalyptic number.

56157331 is a deficient number, since it is larger than the sum of its proper divisors (4398269).

56157331 is a wasteful number, since it uses less digits than its factorization.

56157331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72149.

The product of its digits is 9450, while the sum is 31.

The square root of 56157331 is about 7493.8195201112. The cubic root of 56157331 is about 382.9441912742.

The spelling of 56157331 in words is "fifty-six million, one hundred fifty-seven thousand, three hundred thirty-one".