2518931421 has 12 divisors (see below), whose sum is σ = 3660780448. Its totient is φ = 1668984264.

The previous prime is 2518931419. The next prime is 2518931423. The reversal of 2518931421 is 1241398152.

2518931421 is a `hidden beast` number, since 25 + 189 + 31 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (2518931419) and next prime (2518931423).

It is not a de Polignac number, because 2518931421 - 2¹ = 2518931419 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 (2518931423) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 857065 + ... + 859998.

Almost surely, 2^2518931421 is an apocalyptic number.

It is an amenable number.

2518931421 is a deficient number, since it is larger than the sum of its proper divisors (1141849027).

2518931421 is a wasteful number, since it uses less digits than its factorization.

2518931421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717232 (or 1717229 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 2518931421 is about 50188.9571619096. The cubic root of 2518931421 is about 1360.6260491727.

The spelling of 2518931421 in words is "two billion, five hundred eighteen million, nine hundred thirty-one thousand, four hundred twenty-one".