131351481 has 6 divisors (see below), whose sum is σ = 189729930. Its totient is φ = 87567648.

The previous prime is 131351477. The next prime is 131351497. The reversal of 131351481 is 184153131.

131351481 is a `hidden beast` number, since 131 + 3 + 51 + 481 = 666.

It can be written as a sum of positive squares in only one way, i.e., 131331600 + 19881 = 11460^2 + 141^2 .

It is not a de Polignac number, because 131351481 - 2² = 131351477 is a prime.

It is a super-2 number, since 2×131351481² = 34506423121786722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131341481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7297296 + ... + 7297313.

It is an arithmetic number, because the mean of its divisors is an integer number (31621655).

Almost surely, 2^131351481 is an apocalyptic number.

It is an amenable number.

131351481 is a deficient number, since it is larger than the sum of its proper divisors (58378449).

131351481 is a wasteful number, since it uses less digits than its factorization.

131351481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14594615 (or 14594612 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 131351481 is about 11460.8673755523. The cubic root of 131351481 is about 508.3291223396.

The spelling of 131351481 in words is "one hundred thirty-one million, three hundred fifty-one thousand, four hundred eighty-one".