131422431 has 16 divisors (see below), whose sum is σ = 200448000. Its totient is φ = 75029088.

The previous prime is 131422381. The next prime is 131422453. The reversal of 131422431 is 134224131.

It is not a de Polignac number, because 131422431 - 2¹⁵ = 131389663 is a prime.

It is a super-2 number, since 2×131422431² = 34543710739899522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 131422398 and 131422407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131422231) 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, 28045 + ... + 32393.

It is an arithmetic number, because the mean of its divisors is an integer number (12528000).

Almost surely, 2^131422431 is an apocalyptic number.

131422431 is a deficient number, since it is larger than the sum of its proper divisors (69025569).

131422431 is a wasteful number, since it uses less digits than its factorization.

131422431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5798.

The product of its digits is 576, while the sum is 21.

The square root of 131422431 is about 11463.9622731410. The cubic root of 131422431 is about 508.4206311656.

Adding to 131422431 its reverse (134224131), we get a palindrome (265646562).

The spelling of 131422431 in words is "one hundred thirty-one million, four hundred twenty-two thousand, four hundred thirty-one".