2521631604 has 12 divisors (see below), whose sum is σ = 5883807104. Its totient is φ = 840543864.

The previous prime is 2521631599. The next prime is 2521631617. The reversal of 2521631604 is 4061361252.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2521631604² = 12717251892583225632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105067972 + ... + 105067995.

Almost surely, 2^2521631604 is an apocalyptic number.

It is an amenable number.

2521631604 is an abundant number, since it is smaller than the sum of its proper divisors (3362175500).

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

2521631604 is a wasteful number, since it uses less digits than its factorization.

2521631604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210135974 (or 210135972 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2521631604 is about 50215.8501272258. The cubic root of 2521631604 is about 1361.1120525246.

Adding to 2521631604 its reverse (4061361252), we get a palindrome (6582992856).

The spelling of 2521631604 in words is "two billion, five hundred twenty-one million, six hundred thirty-one thousand, six hundred four".