2516412521 has 4 divisors (see below), whose sum is σ = 2875900032. Its totient is φ = 2156925012.

The previous prime is 2516412473. The next prime is 2516412527. The reversal of 2516412521 is 1252146152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2516412521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2516412527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179743745 + ... + 179743758.

It is an arithmetic number, because the mean of its divisors is an integer number (718975008).

Almost surely, 2^2516412521 is an apocalyptic number.

It is an amenable number.

2516412521 is a deficient number, since it is larger than the sum of its proper divisors (359487511).

2516412521 is an equidigital number, since it uses as much as digits as its factorization.

2516412521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359487510.

The product of its digits is 4800, while the sum is 29.

The square root of 2516412521 is about 50163.8567197539. The cubic root of 2516412521 is about 1360.1723615528.

Adding to 2516412521 its reverse (1252146152), we get a palindrome (3768558673).

The spelling of 2516412521 in words is "two billion, five hundred sixteen million, four hundred twelve thousand, five hundred twenty-one".