51696870 has 32 divisors (see below), whose sum is σ = 129468672. Its totient is φ = 13186272.

The previous prime is 51696857. The next prime is 51696877. The reversal of 51696870 is 7869615.

51696870 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 not an unprimeable number, because it can be changed into a prime (51696877) 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, 36772 + ... + 38151.

It is an arithmetic number, because the mean of its divisors is an integer number (4045896).

Almost surely, 2^51696870 is an apocalyptic number.

51696870 is an abundant number, since it is smaller than the sum of its proper divisors (77771802).

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

51696870 is a wasteful number, since it uses less digits than its factorization.

51696870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74956.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 51696870 is about 7190.0535463931. The cubic root of 51696870 is about 372.5244222235.

The spelling of 51696870 in words is "fifty-one million, six hundred ninety-six thousand, eight hundred seventy".