2521421455 has 16 divisors (see below), whose sum is σ = 3531525120. Its totient is φ = 1692186912.

The previous prime is 2521421449. The next prime is 2521421471. The reversal of 2521421455 is 5541241252.

It is a cyclic number.

It is not a de Polignac number, because 2521421455 - 2³ = 2521421447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764745 + ... + 768034.

It is an arithmetic number, because the mean of its divisors is an integer number (220720320).

Almost surely, 2^2521421455 is an apocalyptic number.

2521421455 is a deficient number, since it is larger than the sum of its proper divisors (1010103665).

2521421455 is a wasteful number, since it uses less digits than its factorization.

2521421455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532838.

The product of its digits is 16000, while the sum is 31.

The square root of 2521421455 is about 50213.7576267700. The cubic root of 2521421455 is about 1361.0742404611.

The spelling of 2521421455 in words is "two billion, five hundred twenty-one million, four hundred twenty-one thousand, four hundred fifty-five".