131961855 has 8 divisors (see below), whose sum is σ = 211138992. Its totient is φ = 70379648.

The previous prime is 131961839. The next prime is 131961857. The reversal of 131961855 is 558169131.

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

It is a cyclic number.

It is not a de Polignac number, because 131961855 - 2⁴ = 131961839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131961857) 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, 4398714 + ... + 4398743.

It is an arithmetic number, because the mean of its divisors is an integer number (26392374).

Almost surely, 2^131961855 is an apocalyptic number.

131961855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131961855 is a deficient number, since it is larger than the sum of its proper divisors (79177137).

131961855 is an equidigital number, since it uses as much as digits as its factorization.

131961855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8797465.

The product of its digits is 32400, while the sum is 39.

The square root of 131961855 is about 11487.4651250831. The cubic root of 131961855 is about 509.1152866003.

It can be divided in two parts, 13196 and 1855, that added together give a palindrome (15051).

The spelling of 131961855 in words is "one hundred thirty-one million, nine hundred sixty-one thousand, eight hundred fifty-five".