51817072 has 10 divisors (see below), whose sum is σ = 100395608. Its totient is φ = 25908528.

The previous prime is 51817069. The next prime is 51817147. The reversal of 51817072 is 27071815.

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 as a sum of consecutive naturals, namely, 1619268 + ... + 1619299.

Almost surely, 2^51817072 is an apocalyptic number.

It is an amenable number.

51817072 is a deficient number, since it is larger than the sum of its proper divisors (48578536).

51817072 is a wasteful number, since it uses less digits than its factorization.

51817072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238575 (or 3238569 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 51817072 is about 7198.4076016853. The cubic root of 51817072 is about 372.8129214455.

Adding to 51817072 its reverse (27071815), we get a palindrome (78888887).

The spelling of 51817072 in words is "fifty-one million, eight hundred seventeen thousand, seventy-two".