51215952 has 20 divisors (see below), whose sum is σ = 132308000. Its totient is φ = 17071968.

The previous prime is 51215933. The next prime is 51215977. The reversal of 51215952 is 25951215.

51215952 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 533452 + ... + 533547.

It is an arithmetic number, because the mean of its divisors is an integer number (6615400).

Almost surely, 2^51215952 is an apocalyptic number.

It is an amenable number.

51215952 is an abundant number, since it is smaller than the sum of its proper divisors (81092048).

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

51215952 is a wasteful number, since it uses less digits than its factorization.

51215952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067010 (or 1067004 counting only the distinct ones).

The product of its digits is 4500, while the sum is 30.

The square root of 51215952 is about 7156.5321210765. The cubic root of 51215952 is about 371.3656665519.

The spelling of 51215952 in words is "fifty-one million, two hundred fifteen thousand, nine hundred fifty-two".