51904479 has 16 divisors (see below), whose sum is σ = 76564224. Its totient is φ = 31012800.

The previous prime is 51904459. The next prime is 51904487. The reversal of 51904479 is 97440915.

It is not a de Polignac number, because 51904479 - 2²¹ = 49807327 is a prime.

It is a super-2 number, since 2×51904479² = 5388149880522882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51904439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8734 + ... + 13419.

It is an arithmetic number, because the mean of its divisors is an integer number (4785264).

Almost surely, 2^51904479 is an apocalyptic number.

51904479 is a deficient number, since it is larger than the sum of its proper divisors (24659745).

51904479 is a wasteful number, since it uses less digits than its factorization.

51904479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22238.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 51904479 is about 7204.4763168464. The cubic root of 51904479 is about 373.0224286743.

It can be divided in two parts, 5190 and 4479, that added together give a palindrome (9669).

The spelling of 51904479 in words is "fifty-one million, nine hundred four thousand, four hundred seventy-nine".