51313464 has 24 divisors (see below), whose sum is σ = 138974160. Its totient is φ = 17104464.

The previous prime is 51313453. The next prime is 51313481. The reversal of 51313464 is 46431315.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356272 + ... + 356415.

It is an arithmetic number, because the mean of its divisors is an integer number (5790590).

Almost surely, 2^51313464 is an apocalyptic number.

It is an amenable number.

51313464 is an abundant number, since it is smaller than the sum of its proper divisors (87660696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51313464 is a wasteful number, since it uses less digits than its factorization.

51313464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712699 (or 712692 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 51313464 is about 7163.3416782951. The cubic root of 51313464 is about 371.6012028745.

Adding to 51313464 its reverse (46431315), we get a palindrome (97744779).

The spelling of 51313464 in words is "fifty-one million, three hundred thirteen thousand, four hundred sixty-four".