2015360251421 has 16 divisors (see below), whose sum is σ = 2228899763328. Its totient is φ = 1806879571200.

The previous prime is 2015360251397. The next prime is 2015360251441. The reversal of 2015360251421 is 1241520635102.

It is a de Polignac number, because none of the positive numbers 2^k-2015360251421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015360251441) 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, 8952281 + ... + 9174641.

It is an arithmetic number, because the mean of its divisors is an integer number (139306235208).

Almost surely, 2^{2015360251421} is an apocalyptic number.

It is an amenable number.

2015360251421 is a deficient number, since it is larger than the sum of its proper divisors (213539511907).

2015360251421 is a wasteful number, since it uses less digits than its factorization.

2015360251421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233732.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 2015360251421 its reverse (1241520635102), we get a palindrome (3256880886523).

The spelling of 2015360251421 in words is "two trillion, fifteen billion, three hundred sixty million, two hundred fifty-one thousand, four hundred twenty-one".