2521204145 has 12 divisors (see below), whose sum is σ = 3193061940. Its totient is φ = 1910805984.

The previous prime is 2521204111. The next prime is 2521204151. The reversal of 2521204145 is 5414021252.

It can be written as a sum of positive squares in 2 ways, for example, as 1704616369 + 816587776 = 41287^2 + 28576^2 .

It is not a de Polignac number, because 2521204145 - 2⁸ = 2521203889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 696590 + ... + 700199.

It is an arithmetic number, because the mean of its divisors is an integer number (266088495).

Almost surely, 2^2521204145 is an apocalyptic number.

It is an amenable number.

2521204145 is a deficient number, since it is larger than the sum of its proper divisors (671857795).

2521204145 is a wasteful number, since it uses less digits than its factorization.

2521204145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396832 (or 1396813 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 2521204145 is about 50211.5937309303. The cubic root of 2521204145 is about 1361.0351377108.

Adding to 2521204145 its reverse (5414021252), we get a palindrome (7935225397).

The spelling of 2521204145 in words is "two billion, five hundred twenty-one million, two hundred four thousand, one hundred forty-five".