131852991 has 4 divisors (see below), whose sum is σ = 175803992. Its totient is φ = 87901992.

The previous prime is 131852983. The next prime is 131852993. The reversal of 131852991 is 199258131.

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

It is not a de Polignac number, because 131852991 - 2³ = 131852983 is a prime.

It is a super-2 number, since 2×131852991² = 34770422471292162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131852993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21975496 + ... + 21975501.

It is an arithmetic number, because the mean of its divisors is an integer number (43950998).

Almost surely, 2^131852991 is an apocalyptic number.

131852991 is a deficient number, since it is larger than the sum of its proper divisors (43951001).

131852991 is an equidigital number, since it uses as much as digits as its factorization.

131852991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43951000.

The product of its digits is 19440, while the sum is 39.

The square root of 131852991 is about 11482.7257652528. The cubic root of 131852991 is about 508.9752472064.

The spelling of 131852991 in words is "one hundred thirty-one million, eight hundred fifty-two thousand, nine hundred ninety-one".