51644946 has 32 divisors (see below), whose sum is σ = 112900608. Its totient is φ = 15678720.

The previous prime is 51644927. The next prime is 51644947. The reversal of 51644946 is 64944615.

It is not an unprimeable number, because it can be changed into a prime (51644947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5005 + ... + 11328.

It is an arithmetic number, because the mean of its divisors is an integer number (3528144).

Almost surely, 2^51644946 is an apocalyptic number.

51644946 is an abundant number, since it is smaller than the sum of its proper divisors (61255662).

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

51644946 is a wasteful number, since it uses less digits than its factorization.

51644946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16386.

The product of its digits is 103680, while the sum is 39.

The square root of 51644946 is about 7186.4418177565. The cubic root of 51644946 is about 372.3996600752.

The spelling of 51644946 in words is "fifty-one million, six hundred forty-four thousand, nine hundred forty-six".