131522131 has 4 divisors (see below), whose sum is σ = 141639232. Its totient is φ = 121405032.

The previous prime is 131522113. The next prime is 131522143. The reversal of 131522131 is 131225131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131522131 - 2⁷ = 131522003 is a prime.

It is a super-2 number, since 2×131522131² = 34596141885562322, 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 = 131522099 and 131522108.

It is not an unprimeable number, because it can be changed into a prime (131522101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5058531 + ... + 5058556.

It is an arithmetic number, because the mean of its divisors is an integer number (35409808).

Almost surely, 2^131522131 is an apocalyptic number.

131522131 is a deficient number, since it is larger than the sum of its proper divisors (10117101).

131522131 is a wasteful number, since it uses less digits than its factorization.

131522131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10117100.

The product of its digits is 180, while the sum is 19.

The square root of 131522131 is about 11468.3098580392. The cubic root of 131522131 is about 508.5491650946.

Adding to 131522131 its reverse (131225131), we get a palindrome (262747262).

The spelling of 131522131 in words is "one hundred thirty-one million, five hundred twenty-two thousand, one hundred thirty-one".