131551631522 has 8 divisors (see below), whose sum is σ = 208934944236. Its totient is φ = 61906650112.

The previous prime is 131551631509. The next prime is 131551631587. The reversal of 131551631522 is 225136155131.

It can be written as a sum of positive squares in 2 ways, for example, as 110303030161 + 21248601361 = 332119^2 + 145769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×131551631522² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1934582783 + ... + 1934582850.

Almost surely, 2^131551631522 is an apocalyptic number.

131551631522 is a deficient number, since it is larger than the sum of its proper divisors (77383312714).

131551631522 is a wasteful number, since it uses less digits than its factorization.

131551631522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869165652.

The product of its digits is 27000, while the sum is 35.

Adding to 131551631522 its reverse (225136155131), we get a palindrome (356687786653).

The spelling of 131551631522 in words is "one hundred thirty-one billion, five hundred fifty-one million, six hundred thirty-one thousand, five hundred twenty-two".