131138425 has 24 divisors (see below), whose sum is σ = 187836192. Its totient is φ = 89760000.

The previous prime is 131138419. The next prime is 131138431. The reversal of 131138425 is 524831131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131138419) and next prime (131138431).

It is not a de Polignac number, because 131138425 - 2³ = 131138417 is a prime.

It is a super-2 number, since 2×131138425² = 34394573022961250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131138393 and 131138402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9351 + ... + 18700.

It is an arithmetic number, because the mean of its divisors is an integer number (7826508).

Almost surely, 2^131138425 is an apocalyptic number.

It is an amenable number.

131138425 is a deficient number, since it is larger than the sum of its proper divisors (56697767).

131138425 is a wasteful number, since it uses less digits than its factorization.

131138425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28089 (or 28084 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 131138425 is about 11451.5686698373. The cubic root of 131138425 is about 508.0541319648.

Adding to 131138425 its reverse (524831131), we get a palindrome (655969556).

The spelling of 131138425 in words is "one hundred thirty-one million, one hundred thirty-eight thousand, four hundred twenty-five".