51480464 has 20 divisors (see below), whose sum is σ = 113992704. Its totient is φ = 22063008.

The previous prime is 51480439. The next prime is 51480469. The reversal of 51480464 is 46408415.

It is a self number, because there is not a number n which added to its sum of digits gives 51480464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51480469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229712 + ... + 229935.

Almost surely, 2^51480464 is an apocalyptic number.

It is an amenable number.

51480464 is an abundant number, since it is smaller than the sum of its proper divisors (62512240).

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

51480464 is a wasteful number, since it uses less digits than its factorization.

51480464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459662 (or 459656 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 51480464 is about 7174.9887804790. The cubic root of 51480464 is about 372.0038925095.

Adding to 51480464 its reverse (46408415), we get a palindrome (97888879).

The spelling of 51480464 in words is "fifty-one million, four hundred eighty thousand, four hundred sixty-four".