131731450 has 12 divisors (see below), whose sum is σ = 245020590. Its totient is φ = 52692560.

The previous prime is 131731423. The next prime is 131731451. The reversal of 131731450 is 54137131.

It can be written as a sum of positive squares in 3 ways, for example, as 97239321 + 34492129 = 9861^2 + 5873^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (131731451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1317265 + ... + 1317364.

Almost surely, 2^131731450 is an apocalyptic number.

131731450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131731450 is a deficient number, since it is larger than the sum of its proper divisors (113289140).

131731450 is a wasteful number, since it uses less digits than its factorization.

131731450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634641 (or 2634636 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 131731450 is about 11477.4322041126. The cubic root of 131731450 is about 508.8188094000.

Adding to 131731450 its reverse (54137131), we get a palindrome (185868581).

The spelling of 131731450 in words is "one hundred thirty-one million, seven hundred thirty-one thousand, four hundred fifty".