51720574 has 8 divisors (see below), whose sum is σ = 77633640. Its totient is φ = 25842696.

The previous prime is 51720563. The next prime is 51720593. The reversal of 51720574 is 47502715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4749 + ... + 11224.

It is an arithmetic number, because the mean of its divisors is an integer number (9704205).

Almost surely, 2^51720574 is an apocalyptic number.

51720574 is a deficient number, since it is larger than the sum of its proper divisors (25913066).

51720574 is a wasteful number, since it uses less digits than its factorization.

51720574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17594.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 51720574 is about 7191.7017457623. The cubic root of 51720574 is about 372.5813500390.

The spelling of 51720574 in words is "fifty-one million, seven hundred twenty thousand, five hundred seventy-four".