51401916 has 36 divisors (see below), whose sum is σ = 136773000. Its totient is φ = 16231968.

The previous prime is 51401881. The next prime is 51401923. The reversal of 51401916 is 61910415.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51401916.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36891 + ... + 38258.

It is an arithmetic number, because the mean of its divisors is an integer number (3799250).

Almost surely, 2^51401916 is an apocalyptic number.

It is an amenable number.

51401916 is an abundant number, since it is smaller than the sum of its proper divisors (85371084).

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

51401916 is a wasteful number, since it uses less digits than its factorization.

51401916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75178 (or 75173 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 51401916 is about 7169.5129541692. The cubic root of 51401916 is about 371.8145971711.

It can be divided in two parts, 5140 and 1916, that added together give a square (7056 = 84²).

The spelling of 51401916 in words is "fifty-one million, four hundred one thousand, nine hundred sixteen".