131423331 has 16 divisors (see below), whose sum is σ = 195219360. Its totient is φ = 78086400.

The previous prime is 131423317. The next prime is 131423333. The reversal of 131423331 is 133324131.

It is not a de Polignac number, because 131423331 - 2⁷ = 131423203 is a prime.

It is a super-2 number, since 2×131423331² = 34544183862271122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131423298 and 131423307.

It is not an unprimeable number, because it can be changed into a prime (131423333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56970 + ... + 59231.

It is an arithmetic number, because the mean of its divisors is an integer number (12201210).

Almost surely, 2^131423331 is an apocalyptic number.

131423331 is a deficient number, since it is larger than the sum of its proper divisors (63796029).

131423331 is a wasteful number, since it uses less digits than its factorization.

131423331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116246.

The product of its digits is 648, while the sum is 21.

The square root of 131423331 is about 11464.0015265177. The cubic root of 131423331 is about 508.4217917426.

Adding to 131423331 its reverse (133324131), we get a palindrome (264747462).

The spelling of 131423331 in words is "one hundred thirty-one million, four hundred twenty-three thousand, three hundred thirty-one".