51424928 has 12 divisors (see below), whose sum is σ = 101242890. Its totient is φ = 25712448.

The previous prime is 51424907. The next prime is 51424937. The reversal of 51424928 is 82942415.

It can be written as a sum of positive squares in only one way, i.e., 50865424 + 559504 = 7132^2 + 748^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803483 + ... + 803546.

Almost surely, 2^51424928 is an apocalyptic number.

It is an amenable number.

51424928 is a deficient number, since it is larger than the sum of its proper divisors (49817962).

51424928 is a wasteful number, since it uses less digits than its factorization.

51424928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607039 (or 1607031 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 51424928 is about 7171.1176255867. The cubic root of 51424928 is about 371.8700744869.

The spelling of 51424928 in words is "fifty-one million, four hundred twenty-four thousand, nine hundred twenty-eight".