51534464 has 16 divisors (see below), whose sum is σ = 102666570. Its totient is φ = 25767168.

The previous prime is 51534449. The next prime is 51534473. The reversal of 51534464 is 46443515.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 2534464 = 7000^2 + 1592^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 51534464.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201179 + ... + 201434.

Almost surely, 2^51534464 is an apocalyptic number.

It is an amenable number.

51534464 is a deficient number, since it is larger than the sum of its proper divisors (51132106).

51534464 is an equidigital number, since it uses as much as digits as its factorization.

51534464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402627 (or 402615 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 51534464 is about 7178.7508662719. The cubic root of 51534464 is about 372.1339171760.

Adding to 51534464 its reverse (46443515), we get a palindrome (97977979).

The spelling of 51534464 in words is "fifty-one million, five hundred thirty-four thousand, four hundred sixty-four".