51539370 has 32 divisors (see below), whose sum is σ = 126574272. Its totient is φ = 13423872.

The previous prime is 51539311. The next prime is 51539377. The reversal of 51539370 is 7393515.

51539370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51539377) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18687 + ... + 21266.

It is an arithmetic number, because the mean of its divisors is an integer number (3955446).

Almost surely, 2^51539370 is an apocalyptic number.

51539370 is an abundant number, since it is smaller than the sum of its proper divisors (75034902).

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

51539370 is a wasteful number, since it uses less digits than its factorization.

51539370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40006.

The product of its (nonzero) digits is 14175, while the sum is 33.

The square root of 51539370 is about 7179.0925610414. The cubic root of 51539370 is about 372.1457256561.

The spelling of 51539370 in words is "fifty-one million, five hundred thirty-nine thousand, three hundred seventy".