51331304 has 8 divisors (see below), whose sum is σ = 96246210. Its totient is φ = 25665648.

The previous prime is 51331253. The next prime is 51331327. The reversal of 51331304 is 40313315.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26030404 + 25300900 = 5102^2 + 5030^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3208199 + ... + 3208214.

Almost surely, 2^51331304 is an apocalyptic number.

It is an amenable number.

51331304 is a deficient number, since it is larger than the sum of its proper divisors (44914906).

51331304 is a wasteful number, since it uses less digits than its factorization.

51331304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6416419 (or 6416415 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 51331304 is about 7164.5867989717. The cubic root of 51331304 is about 371.6442623811.

Adding to 51331304 its reverse (40313315), we get a palindrome (91644619).

The spelling of 51331304 in words is "fifty-one million, three hundred thirty-one thousand, three hundred four".