115531521501 has 32 divisors (see below), whose sum is σ = 184066473600. Its totient is φ = 63627898880.

The previous prime is 115531521491. The next prime is 115531521533. The reversal of 115531521501 is 105125135511.

It is a cyclic number.

It is not a de Polignac number, because 115531521501 - 2⁶ = 115531521437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115531521571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3534396 + ... + 3566933.

It is an arithmetic number, because the mean of its divisors is an integer number (5752077300).

Almost surely, 2^115531521501 is an apocalyptic number.

115531521501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115531521501 is a deficient number, since it is larger than the sum of its proper divisors (68534952099).

115531521501 is a wasteful number, since it uses less digits than its factorization.

115531521501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7101389.

The product of its (nonzero) digits is 3750, while the sum is 30.

The spelling of 115531521501 in words is "one hundred fifteen billion, five hundred thirty-one million, five hundred twenty-one thousand, five hundred one".