56731511 has 12 divisors (see below), whose sum is σ = 61950600. Its totient is φ = 51882768.

The previous prime is 56731487. The next prime is 56731529. The reversal of 56731511 is 11513765.

It is not a de Polignac number, because 56731511 - 2⁶ = 56731447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56731541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7760 + ... + 13178.

It is an arithmetic number, because the mean of its divisors is an integer number (5162550).

Almost surely, 2^56731511 is an apocalyptic number.

56731511 is a deficient number, since it is larger than the sum of its proper divisors (5219089).

56731511 is a wasteful number, since it uses less digits than its factorization.

56731511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486 (or 5467 counting only the distinct ones).

The product of its digits is 3150, while the sum is 29.

The square root of 56731511 is about 7532.0323286614. The cubic root of 56731511 is about 384.2449044471.

The spelling of 56731511 in words is "fifty-six million, seven hundred thirty-one thousand, five hundred eleven".