131420227531 has 4 divisors (see below), whose sum is σ = 131970103200. Its totient is φ = 130870351864.

The previous prime is 131420227513. The next prime is 131420227559. The reversal of 131420227531 is 135722024131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135722024131 = 3463 ⋅39192037.

It is a cyclic number.

It is not a de Polignac number, because 131420227531 - 2⁹ = 131420227019 is a prime.

It is a super-2 number, since 2×131420227531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131420227493 and 131420227502.

It is not an unprimeable number, because it can be changed into a prime (131420227571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274937476 + ... + 274937953.

It is an arithmetic number, because the mean of its divisors is an integer number (32992525800).

Almost surely, 2^131420227531 is an apocalyptic number.

131420227531 is a deficient number, since it is larger than the sum of its proper divisors (549875669).

131420227531 is an equidigital number, since it uses as much as digits as its factorization.

131420227531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549875668.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 131420227531 in words is "one hundred thirty-one billion, four hundred twenty million, two hundred twenty-seven thousand, five hundred thirty-one".