51248220 has 48 divisors (see below), whose sum is σ = 148448160. Its totient is φ = 13194496.

The previous prime is 51248213. The next prime is 51248231. The reversal of 51248220 is 2284215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12987 + ... + 16466.

It is an arithmetic number, because the mean of its divisors is an integer number (3092670).

Almost surely, 2^51248220 is an apocalyptic number.

It is an amenable number.

51248220 is an abundant number, since it is smaller than the sum of its proper divisors (97199940).

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

51248220 is a wasteful number, since it uses less digits than its factorization.

51248220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29494 (or 29492 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 51248220 is about 7158.7862099660. The cubic root of 51248220 is about 371.4436416821.

The spelling of 51248220 in words is "fifty-one million, two hundred forty-eight thousand, two hundred twenty".