51217944 has 32 divisors (see below), whose sum is σ = 132462000. Its totient is φ = 16483712.

The previous prime is 51217927. The next prime is 51217951. The reversal of 51217944 is 44971215.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36099 + ... + 37490.

Almost surely, 2^51217944 is an apocalyptic number.

It is an amenable number.

51217944 is an abundant number, since it is smaller than the sum of its proper divisors (81244056).

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

51217944 is a wasteful number, since it uses less digits than its factorization.

51217944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73627 (or 73623 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 51217944 is about 7156.6712932759. The cubic root of 51217944 is about 371.3704811379.

The spelling of 51217944 in words is "fifty-one million, two hundred seventeen thousand, nine hundred forty-four".