51021142215 has 16 divisors (see below), whose sum is σ = 81689358336. Its totient is φ = 27192765600.

The previous prime is 51021142189. The next prime is 51021142217. The reversal of 51021142215 is 51224112015.

It is a happy number.

51021142215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51021142215 - 2¹⁰ = 51021141191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51021142217) 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, 1134091 + ... + 1178220.

It is an arithmetic number, because the mean of its divisors is an integer number (5105584896).

Almost surely, 2^51021142215 is an apocalyptic number.

51021142215 is a deficient number, since it is larger than the sum of its proper divisors (30668216121).

51021142215 is a wasteful number, since it uses less digits than its factorization.

51021142215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313790.

The product of its (nonzero) digits is 800, while the sum is 24.

The spelling of 51021142215 in words is "fifty-one billion, twenty-one million, one hundred forty-two thousand, two hundred fifteen".