51164442 has 24 divisors (see below), whose sum is σ = 126693216. Its totient is φ = 14618376.

The previous prime is 51164417. The next prime is 51164461. The reversal of 51164442 is 24446115.

51164442 is a `hidden beast` number, since 5 + 11 + 644 + 4 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202908 + ... + 203159.

It is an arithmetic number, because the mean of its divisors is an integer number (5278884).

Almost surely, 2^51164442 is an apocalyptic number.

51164442 is an abundant number, since it is smaller than the sum of its proper divisors (75528774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51164442 is a wasteful number, since it uses less digits than its factorization.

51164442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406082 (or 406079 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 51164442 is about 7152.9324056641. The cubic root of 51164442 is about 371.2411255233.

The spelling of 51164442 in words is "fifty-one million, one hundred sixty-four thousand, four hundred forty-two".