51162165 has 32 divisors (see below), whose sum is σ = 91916160. Its totient is φ = 26998272.

The previous prime is 51162151. The next prime is 51162169. The reversal of 51162165 is 56126115.

It is a happy number.

It is not a de Polignac number, because 51162165 - 2⁷ = 51162037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51162169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11142 + ... + 15048.

It is an arithmetic number, because the mean of its divisors is an integer number (2872380).

Almost surely, 2^51162165 is an apocalyptic number.

It is an amenable number.

51162165 is a deficient number, since it is larger than the sum of its proper divisors (40753995).

51162165 is a wasteful number, since it uses less digits than its factorization.

51162165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018 (or 4012 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 51162165 is about 7152.7732384020. The cubic root of 51162165 is about 371.2356182573.

The spelling of 51162165 in words is "fifty-one million, one hundred sixty-two thousand, one hundred sixty-five".