2520555551 has 4 divisors (see below), whose sum is σ = 2588678712. Its totient is φ = 2452432392.

The previous prime is 2520555529. The next prime is 2520555559. The reversal of 2520555551 is 1555550252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2520555551 - 2¹⁸ = 2520293407 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 (2520555559) 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, 34061525 + ... + 34061598.

It is an arithmetic number, because the mean of its divisors is an integer number (647169678).

Almost surely, 2^2520555551 is an apocalyptic number.

2520555551 is a deficient number, since it is larger than the sum of its proper divisors (68123161).

2520555551 is an equidigital number, since it uses as much as digits as its factorization.

2520555551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68123160.

The product of its (nonzero) digits is 62500, while the sum is 35.

The square root of 2520555551 is about 50205.1347075177. The cubic root of 2520555551 is about 1360.9184163768.

The spelling of 2520555551 in words is "two billion, five hundred twenty million, five hundred fifty-five thousand, five hundred fifty-one".