131998811 has 8 divisors (see below), whose sum is σ = 150941664. Its totient is φ = 113077440.

The previous prime is 131998759. The next prime is 131998831. The reversal of 131998811 is 118899131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131998811 - 2⁶ = 131998747 is a prime.

It is a super-2 number, since 2×131998811² = 34847372210827442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131998831) 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, 11231 + ... + 19751.

It is an arithmetic number, because the mean of its divisors is an integer number (18867708).

Almost surely, 2^131998811 is an apocalyptic number.

131998811 is a deficient number, since it is larger than the sum of its proper divisors (18942853).

131998811 is an equidigital number, since it uses as much as digits as its factorization.

131998811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10741.

The product of its digits is 15552, while the sum is 41.

The square root of 131998811 is about 11489.0735483763. The cubic root of 131998811 is about 509.1628081826.

The spelling of 131998811 in words is "one hundred thirty-one million, nine hundred ninety-eight thousand, eight hundred eleven".