131545998 has 16 divisors (see below), whose sum is σ = 292324560. Its totient is φ = 43848648.

The previous prime is 131545969. The next prime is 131546003. The reversal of 131545998 is 899545131.

131545998 is a `hidden beast` number, since 1 + 3 + 1 + 54 + 599 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217965 + ... + 1218072.

It is an arithmetic number, because the mean of its divisors is an integer number (18270285).

Almost surely, 2^131545998 is an apocalyptic number.

131545998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

131545998 is an abundant number, since it is smaller than the sum of its proper divisors (160778562).

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

131545998 is a wasteful number, since it uses less digits than its factorization.

131545998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436048 (or 2436042 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 131545998 is about 11469.3503739314. The cubic root of 131545998 is about 508.5799249592.

The spelling of 131545998 in words is "one hundred thirty-one million, five hundred forty-five thousand, nine hundred ninety-eight".