51604719 has 8 divisors (see below), whose sum is σ = 69934512. Its totient is φ = 33839040.

The previous prime is 51604711. The next prime is 51604733. The reversal of 51604719 is 91740615.

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

It is not a de Polignac number, because 51604719 - 2³ = 51604711 is a prime.

It is a super-2 number, since 2×51604719² = 5326094046137922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51604719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51604711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140814 + ... + 141179.

It is an arithmetic number, because the mean of its divisors is an integer number (8741814).

Almost surely, 2^51604719 is an apocalyptic number.

51604719 is a deficient number, since it is larger than the sum of its proper divisors (18329793).

51604719 is a wasteful number, since it uses less digits than its factorization.

51604719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282057.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 51604719 is about 7183.6424604792. The cubic root of 51604719 is about 372.3029457886.

The spelling of 51604719 in words is "fifty-one million, six hundred four thousand, seven hundred nineteen".