131422665 has 32 divisors (see below), whose sum is σ = 242891136. Its totient is φ = 59970560.

The previous prime is 131422661. The next prime is 131422679. The reversal of 131422665 is 566224131.

It is not a de Polignac number, because 131422665 - 2² = 131422661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131422661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20622 + ... + 26231.

It is an arithmetic number, because the mean of its divisors is an integer number (7590348).

Almost surely, 2^131422665 is an apocalyptic number.

131422665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131422665 is a deficient number, since it is larger than the sum of its proper divisors (111468471).

131422665 is a wasteful number, since it uses less digits than its factorization.

131422665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46889.

The product of its digits is 8640, while the sum is 30.

The square root of 131422665 is about 11463.9724790319. The cubic root of 131422665 is about 508.4209329161.

Adding to 131422665 its reverse (566224131), we get a palindrome (697646796).

The spelling of 131422665 in words is "one hundred thirty-one million, four hundred twenty-two thousand, six hundred sixty-five".