51724172 has 6 divisors (see below), whose sum is σ = 90517308. Its totient is φ = 25862084.

The previous prime is 51724159. The next prime is 51724207. The reversal of 51724172 is 27142715.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6465518 + ... + 6465525.

It is an arithmetic number, because the mean of its divisors is an integer number (15086218).

Almost surely, 2^51724172 is an apocalyptic number.

It is an amenable number.

51724172 is a deficient number, since it is larger than the sum of its proper divisors (38793136).

51724172 is a wasteful number, since it uses less digits than its factorization.

51724172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12931047 (or 12931045 counting only the distinct ones).

The product of its digits is 3920, while the sum is 29.

The square root of 51724172 is about 7191.9518908291. The cubic root of 51724172 is about 372.5899895191.

Adding to 51724172 its reverse (27142715), we get a palindrome (78866887).

The spelling of 51724172 in words is "fifty-one million, seven hundred twenty-four thousand, one hundred seventy-two".