131431302 has 32 divisors (see below), whose sum is σ = 293621760. Its totient is φ = 43577640.

The previous prime is 131431283. The next prime is 131431309. The reversal of 131431302 is 203134131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131431309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3943 + ... + 16685.

It is an arithmetic number, because the mean of its divisors is an integer number (9175680).

Almost surely, 2^131431302 is an apocalyptic number.

131431302 is an abundant number, since it is smaller than the sum of its proper divisors (162190458).

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

131431302 is a wasteful number, since it uses less digits than its factorization.

131431302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12945 (or 12939 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 131431302 is about 11464.3491747242. The cubic root of 131431302 is about 508.4320703543.

Adding to 131431302 its reverse (203134131), we get a palindrome (334565433).

The spelling of 131431302 in words is "one hundred thirty-one million, four hundred thirty-one thousand, three hundred two".