131521398 has 16 divisors (see below), whose sum is σ = 263876400. Its totient is φ = 43701536.

The previous prime is 131521393. The next prime is 131521433. The reversal of 131521398 is 893125131.

131521398 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131521393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32673 + ... + 36476.

It is an arithmetic number, because the mean of its divisors is an integer number (16492275).

Almost surely, 2^131521398 is an apocalyptic number.

131521398 is an abundant number, since it is smaller than the sum of its proper divisors (132355002).

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

131521398 is a wasteful number, since it uses less digits than its factorization.

131521398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69471.

The product of its digits is 6480, while the sum is 33.

The square root of 131521398 is about 11468.2779003650. The cubic root of 131521398 is about 508.5482203430.

The spelling of 131521398 in words is "one hundred thirty-one million, five hundred twenty-one thousand, three hundred ninety-eight".