51503028 has 24 divisors (see below), whose sum is σ = 124051200. Its totient is φ = 16613760.

The previous prime is 51502999. The next prime is 51503083. The reversal of 51503028 is 82030515.

It is a junction number, because it is equal to n+sod(n) for n = 51502989 and 51503007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68853 + ... + 69596.

It is an arithmetic number, because the mean of its divisors is an integer number (5168800).

Almost surely, 2^51503028 is an apocalyptic number.

It is an amenable number.

51503028 is an abundant number, since it is smaller than the sum of its proper divisors (72548172).

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

51503028 is a wasteful number, since it uses less digits than its factorization.

51503028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138487 (or 138485 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51503028 is about 7176.5610148594. The cubic root of 51503028 is about 372.0582346108.

The spelling of 51503028 in words is "fifty-one million, five hundred three thousand, twenty-eight".