131622865 has 16 divisors (see below), whose sum is σ = 173062656. Its totient is φ = 95305600.

The previous prime is 131622863. The next prime is 131622877. The reversal of 131622865 is 568226131.

It is not a de Polignac number, because 131622865 - 2¹ = 131622863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131622865.

It is not an unprimeable number, because it can be changed into a prime (131622863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7680 + ... + 17950.

It is an arithmetic number, because the mean of its divisors is an integer number (10816416).

Almost surely, 2^131622865 is an apocalyptic number.

It is an amenable number.

131622865 is a deficient number, since it is larger than the sum of its proper divisors (41439791).

131622865 is a wasteful number, since it uses less digits than its factorization.

131622865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10520.

The product of its digits is 17280, while the sum is 34.

The square root of 131622865 is about 11472.7008589957. The cubic root of 131622865 is about 508.6789661100.

Adding to 131622865 its reverse (568226131), we get a palindrome (699848996).

The spelling of 131622865 in words is "one hundred thirty-one million, six hundred twenty-two thousand, eight hundred sixty-five".