51478824 has 16 divisors (see below), whose sum is σ = 128697120. Its totient is φ = 17159600.

The previous prime is 51478781. The next prime is 51478837. The reversal of 51478824 is 42887415.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072452 + ... + 1072499.

It is an arithmetic number, because the mean of its divisors is an integer number (8043570).

Almost surely, 2^51478824 is an apocalyptic number.

It is an amenable number.

51478824 is an abundant number, since it is smaller than the sum of its proper divisors (77218296).

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

51478824 is a wasteful number, since it uses less digits than its factorization.

51478824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144960 (or 2144956 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 51478824 is about 7174.8744936758. The cubic root of 51478824 is about 371.9999421898. Note that the first 4 decimals are identical.

The spelling of 51478824 in words is "fifty-one million, four hundred seventy-eight thousand, eight hundred twenty-four".