8138024521 has 27 divisors (see below), whose sum is σ = 9165216333. Its totient is φ = 7220488440.

The previous prime is 8138024513. The next prime is 8138024561. The reversal of 8138024521 is 1254208318.

It is a happy number.

The square root of 8138024521 is 90211.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 8138024521 - 2³ = 8138024513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8138024561) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 58546870 + ... + 58547008.

Almost surely, 2^8138024521 is an apocalyptic number.

8138024521 is the 90211-st square number.

8138024521 is the 45106-th centered octagonal number.

It is an amenable number.

8138024521 is a deficient number, since it is larger than the sum of its proper divisors (1027191812).

8138024521 is an equidigital number, since it uses as much as digits as its factorization.

8138024521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The cubic root of 8138024521 is about 2011.4365217494.

The spelling of 8138024521 in words is "eight billion, one hundred thirty-eight million, twenty-four thousand, five hundred twenty-one".