100000000521 has 8 divisors (see below), whose sum is σ = 148148148960. Its totient is φ = 66666666996.

The previous prime is 100000000519. The next prime is 100000000567. The reversal of 100000000521 is 125000000001.

It is a happy number.

It is not a de Polignac number, because 100000000521 - 2¹ = 100000000519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (100000000621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851851835 + ... + 1851851888.

It is an arithmetic number, because the mean of its divisors is an integer number (18518518620).

Almost surely, 2^100000000521 is an apocalyptic number.

It is an amenable number.

100000000521 is a deficient number, since it is larger than the sum of its proper divisors (48148148439).

100000000521 is an equidigital number, since it uses as much as digits as its factorization.

100000000521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703703732 (or 3703703726 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

Adding to 100000000521 its reverse (125000000001), we get a palindrome (225000000522).

The spelling of 100000000521 in words is "one hundred billion, five hundred twenty-one", and thus it is an aban number.