2513632421 has 4 divisors (see below), whose sum is σ = 2513824992. Its totient is φ = 2513439852.

The previous prime is 2513632411. The next prime is 2513632423. The reversal of 2513632421 is 1242363152.

It is a happy number.

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 not a de Polignac number, because 2513632421 - 2⁶ = 2513632357 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 (2513632423) 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, 75161 + ... + 103326.

It is an arithmetic number, because the mean of its divisors is an integer number (628456248).

Almost surely, 2^2513632421 is an apocalyptic number.

It is an amenable number.

2513632421 is a deficient number, since it is larger than the sum of its proper divisors (192571).

2513632421 is a wasteful number, since it uses less digits than its factorization.

2513632421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192570.

The product of its digits is 8640, while the sum is 29.

The square root of 2513632421 is about 50136.1388720751. The cubic root of 2513632421 is about 1359.6712767003.

Adding to 2513632421 its reverse (1242363152), we get a palindrome (3755995573).

The spelling of 2513632421 in words is "two billion, five hundred thirteen million, six hundred thirty-two thousand, four hundred twenty-one".