131957506 has 8 divisors (see below), whose sum is σ = 198224784. Its totient is φ = 65882580.

The previous prime is 131957491. The next prime is 131957533. The reversal of 131957506 is 605759131.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46360 + ... + 49123.

It is an arithmetic number, because the mean of its divisors is an integer number (24778098).

Almost surely, 2^131957506 is an apocalyptic number.

131957506 is a deficient number, since it is larger than the sum of its proper divisors (66267278).

131957506 is an equidigital number, since it uses as much as digits as its factorization.

131957506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96176.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 131957506 is about 11487.2758302393. The cubic root of 131957506 is about 509.1096936540.

The spelling of 131957506 in words is "one hundred thirty-one million, nine hundred fifty-seven thousand, five hundred six".