51214819902 has 32 divisors (see below), whose sum is σ = 102903270912. Its totient is φ = 16992717504.

The previous prime is 51214819879. The next prime is 51214819907. The reversal of 51214819902 is 20991841215.

51214819902 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 (51214819907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8143003 + ... + 8149289.

It is an arithmetic number, because the mean of its divisors is an integer number (3215727216).

Almost surely, 2^51214819902 is an apocalyptic number.

51214819902 is an abundant number, since it is smaller than the sum of its proper divisors (51688451010).

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

51214819902 is a wasteful number, since it uses less digits than its factorization.

51214819902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12352.

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 51214819902 in words is "fifty-one billion, two hundred fourteen million, eight hundred nineteen thousand, nine hundred two".