51164055 has 80 divisors (see below), whose sum is σ = 99026400. Its totient is φ = 25194240.

The previous prime is 51164051. The next prime is 51164063. The reversal of 51164055 is 55046115.

It is a happy number.

51164055 is a `hidden beast` number, since 5 + 11 + 640 + 5 + 5 = 666.

It is not a de Polignac number, because 51164055 - 2² = 51164051 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51164051) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 469341 + ... + 469449.

It is an arithmetic number, because the mean of its divisors is an integer number (1237830).

Almost surely, 2^51164055 is an apocalyptic number.

51164055 is a deficient number, since it is larger than the sum of its proper divisors (47862345).

51164055 is a wasteful number, since it uses less digits than its factorization.

51164055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 51164055 is about 7152.9053537706. The cubic root of 51164055 is about 371.2401895173.

The spelling of 51164055 in words is "fifty-one million, one hundred sixty-four thousand, fifty-five".