131999258 has 8 divisors (see below), whose sum is σ = 198083028. Its totient is φ = 65971584.

The previous prime is 131999233. The next prime is 131999261. The reversal of 131999258 is 852999131.

It can be written as a sum of positive squares in 2 ways, for example, as 131721529 + 277729 = 11477^2 + 527^2 .

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

It is a super-2 number, since 2×131999258² = 34847608225101128, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7541 + ... + 17912.

Almost surely, 2^131999258 is an apocalyptic number.

131999258 is a deficient number, since it is larger than the sum of its proper divisors (66083770).

131999258 is a wasteful number, since it uses less digits than its factorization.

131999258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28048.

The product of its digits is 174960, while the sum is 47.

The square root of 131999258 is about 11489.0930016255. The cubic root of 131999258 is about 509.1633829239.

The spelling of 131999258 in words is "one hundred thirty-one million, nine hundred ninety-nine thousand, two hundred fifty-eight".