51656155 has 16 divisors (see below), whose sum is σ = 65479680. Its totient is φ = 39012192.

The previous prime is 51656131. The next prime is 51656179. The reversal of 51656155 is 55165615.

It is an interprime number because it is at equal distance from previous prime (51656131) and next prime (51656179).

It is a cyclic number.

It is not a de Polignac number, because 51656155 - 2⁷ = 51656027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51656155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32182 + ... + 33748.

It is an arithmetic number, because the mean of its divisors is an integer number (4092480).

Almost surely, 2^51656155 is an apocalyptic number.

51656155 is a deficient number, since it is larger than the sum of its proper divisors (13823525).

51656155 is a wasteful number, since it uses less digits than its factorization.

51656155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938.

The product of its digits is 22500, while the sum is 34.

The square root of 51656155 is about 7187.2216467840. The cubic root of 51656155 is about 372.4265999545.

The spelling of 51656155 in words is "fifty-one million, six hundred fifty-six thousand, one hundred fifty-five".