51242156 has 12 divisors (see below), whose sum is σ = 102484368. Its totient is φ = 21960912.

The previous prime is 51242141. The next prime is 51242167. The reversal of 51242156 is 65124215.

51242156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

51242156 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915011 + ... + 915066.

It is an arithmetic number, because the mean of its divisors is an integer number (8540364).

Almost surely, 2^51242156 is an apocalyptic number.

It is an amenable number.

51242156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51242156 is a wasteful number, since it uses less digits than its factorization.

51242156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830088 (or 1830086 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 51242156 is about 7158.3626619500. The cubic root of 51242156 is about 371.4289906166.

The spelling of 51242156 in words is "fifty-one million, two hundred forty-two thousand, one hundred fifty-six".