2551312405 has 16 divisors (see below), whose sum is σ = 3111871680. Its totient is φ = 2007669888.

The previous prime is 2551312391. The next prime is 2551312411. The reversal of 2551312405 is 5042131552.

It is a cyclic number.

It is not a de Polignac number, because 2551312405 - 2⁷ = 2551312277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129114 + ... + 147556.

It is an arithmetic number, because the mean of its divisors is an integer number (194491980).

Almost surely, 2^2551312405 is an apocalyptic number.

It is an amenable number.

2551312405 is a deficient number, since it is larger than the sum of its proper divisors (560559275).

2551312405 is a wasteful number, since it uses less digits than its factorization.

2551312405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18900.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2551312405 is about 50510.5177661049. The cubic root of 2551312405 is about 1366.4315474634.

Adding to 2551312405 its reverse (5042131552), we get a palindrome (7593443957).

The spelling of 2551312405 in words is "two billion, five hundred fifty-one million, three hundred twelve thousand, four hundred five".