131131422 has 24 divisors (see below), whose sum is σ = 284441976. Its totient is φ = 43660656.

The previous prime is 131131409. The next prime is 131131439. The reversal of 131131422 is 224131131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131131395 and 131131404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14293 + ... + 21599.

It is an arithmetic number, because the mean of its divisors is an integer number (11851749).

Almost surely, 2^131131422 is an apocalyptic number.

131131422 is an abundant number, since it is smaller than the sum of its proper divisors (153310554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131131422 is a wasteful number, since it uses less digits than its factorization.

131131422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312 (or 8309 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 131131422 is about 11451.2628997853. The cubic root of 131131422 is about 508.0450881715.

Adding to 131131422 its reverse (224131131), we get a palindrome (355262553).

It can be divided in two parts, 13113 and 1422, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 131131422 in words is "one hundred thirty-one million, one hundred thirty-one thousand, four hundred twenty-two".