51402400215751 has 8 divisors (see below), whose sum is σ = 55356519412880. Its totient is φ = 47448293648832.

The previous prime is 51402400215731. The next prime is 51402400215787. The reversal of 51402400215751 is 15751200420415.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51402400215751 - 2⁴⁵ = 16218028126919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51402400215751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51402400215731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6356971 + ... + 11967283.

It is an arithmetic number, because the mean of its divisors is an integer number (6919564926610).

Almost surely, 2^{51402400215751} is an apocalyptic number.

51402400215751 is a deficient number, since it is larger than the sum of its proper divisors (3954119197129).

51402400215751 is a wasteful number, since it uses less digits than its factorization.

51402400215751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6315105.

The product of its (nonzero) digits is 56000, while the sum is 37.

The spelling of 51402400215751 in words is "fifty-one trillion, four hundred two billion, four hundred million, two hundred fifteen thousand, seven hundred fifty-one".