2521630436 has 12 divisors (see below), whose sum is σ = 4752303612. Its totient is φ = 1163829408.

The previous prime is 2521630411. The next prime is 2521630439. The reversal of 2521630436 is 6340361252.

It can be written as a sum of positive squares in 2 ways, for example, as 957902500 + 1563727936 = 30950^2 + 39544^2 .

It is not an unprimeable number, because it can be changed into a prime (2521630439) 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, 24246395 + ... + 24246498.

It is an arithmetic number, because the mean of its divisors is an integer number (396025301).

Almost surely, 2^2521630436 is an apocalyptic number.

2521630436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2521630436 is a deficient number, since it is larger than the sum of its proper divisors (2230673176).

2521630436 is a wasteful number, since it uses less digits than its factorization.

2521630436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48492910 (or 48492908 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 2521630436 is about 50215.8384974303. The cubic root of 2521630436 is about 1361.1118423724. Note that the first 3 decimals are identical.

Adding to 2521630436 its reverse (6340361252), we get a palindrome (8861991688).

The spelling of 2521630436 in words is "two billion, five hundred twenty-one million, six hundred thirty thousand, four hundred thirty-six".