131422515 has 32 divisors (see below), whose sum is σ = 241367040. Its totient is φ = 59816064.

The previous prime is 131422477. The next prime is 131422517. The reversal of 131422515 is 515224131.

It is a happy number.

It is not a de Polignac number, because 131422515 - 2¹¹ = 131420467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131422517) 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, 22477 + ... + 27713.

It is an arithmetic number, because the mean of its divisors is an integer number (7542720).

Almost surely, 2^131422515 is an apocalyptic number.

131422515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131422515 is a deficient number, since it is larger than the sum of its proper divisors (109944525).

131422515 is a wasteful number, since it uses less digits than its factorization.

131422515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491.

The product of its digits is 1200, while the sum is 24.

The square root of 131422515 is about 11463.9659367952. The cubic root of 131422515 is about 508.4207394864.

Adding to 131422515 its reverse (515224131), we get a palindrome (646646646).

The spelling of 131422515 in words is "one hundred thirty-one million, four hundred twenty-two thousand, five hundred fifteen".