131361765 has 32 divisors (see below), whose sum is σ = 214220160. Its totient is φ = 68726784.

The previous prime is 131361761. The next prime is 131361773. The reversal of 131361765 is 567163131.

It is a happy number.

It is not a de Polignac number, because 131361765 - 2² = 131361761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131361761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199006 + ... + 199664.

It is an arithmetic number, because the mean of its divisors is an integer number (6694380).

Almost surely, 2^131361765 is an apocalyptic number.

131361765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131361765 is a deficient number, since it is larger than the sum of its proper divisors (82858395).

131361765 is a wasteful number, since it uses less digits than its factorization.

131361765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901.

The product of its digits is 11340, while the sum is 33.

The square root of 131361765 is about 11461.3160239128. The cubic root of 131361765 is about 508.3423883245.

The spelling of 131361765 in words is "one hundred thirty-one million, three hundred sixty-one thousand, seven hundred sixty-five".