2521971045 has 160 divisors (see below), whose sum is σ = 5212145664. Its totient is φ = 1154736000.

The previous prime is 2521971043. The next prime is 2521971083. The reversal of 2521971045 is 5401791252.

2521971045 is a `hidden beast` number, since 2 + 521 + 97 + 1 + 0 + 45 = 666.

It is not a de Polignac number, because 2521971045 - 2¹ = 2521971043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521971043) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 15472134 + ... + 15472296.

Almost surely, 2^2521971045 is an apocalyptic number.

It is an amenable number.

2521971045 is an abundant number, since it is smaller than the sum of its proper divisors (2690174619).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2521971045 is a wasteful number, since it uses less digits than its factorization.

2521971045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 2521971045 is about 50219.2298328041. The cubic root of 2521971045 is about 1361.1731236325.

The spelling of 2521971045 in words is "two billion, five hundred twenty-one million, nine hundred seventy-one thousand, forty-five".