51204240215 has 8 divisors (see below), whose sum is σ = 61535055888. Its totient is φ = 40903413760.

The previous prime is 51204240179. The next prime is 51204240223.

51204240215 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-51204240215 is a prime.

It is a super-3 number, since 3×51204240215³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7493546 + ... + 7500375.

It is an arithmetic number, because the mean of its divisors is an integer number (7691881986).

Almost surely, 2^51204240215 is an apocalyptic number.

51204240215 is a deficient number, since it is larger than the sum of its proper divisors (10330815673).

51204240215 is a wasteful number, since it uses less digits than its factorization.

51204240215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14994609.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 51204240215 in words is "fifty-one billion, two hundred four million, two hundred forty thousand, two hundred fifteen".