131517998 has 4 divisors (see below), whose sum is σ = 197277000. Its totient is φ = 65758998.

The previous prime is 131517973. The next prime is 131518003. The reversal of 131517998 is 899715131.

131517998 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32879498 + ... + 32879501.

It is an arithmetic number, because the mean of its divisors is an integer number (49319250).

Almost surely, 2^131517998 is an apocalyptic number.

131517998 is a deficient number, since it is larger than the sum of its proper divisors (65759002).

131517998 is an equidigital number, since it uses as much as digits as its factorization.

131517998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65759001.

The product of its digits is 68040, while the sum is 44.

The square root of 131517998 is about 11468.1296644222. The cubic root of 131517998 is about 508.5438380933.

The spelling of 131517998 in words is "one hundred thirty-one million, five hundred seventeen thousand, nine hundred ninety-eight".