131445250 has 16 divisors (see below), whose sum is σ = 246065976. Its totient is φ = 52578000.

The previous prime is 131445233. The next prime is 131445263. The reversal of 131445250 is 52544131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24591681 + 106853569 = 4959^2 + 10337^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262641 + ... + 263140.

Almost surely, 2^131445250 is an apocalyptic number.

131445250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131445250 is a deficient number, since it is larger than the sum of its proper divisors (114620726).

131445250 is an equidigital number, since it uses as much as digits as its factorization.

131445250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525798 (or 525788 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 131445250 is about 11464.9574792059. The cubic root of 131445250 is about 508.4500553131.

Adding to 131445250 its reverse (52544131), we get a palindrome (183989381).

It can be divided in two parts, 1314 and 45250, that added together give a palindrome (46564).

The spelling of 131445250 in words is "one hundred thirty-one million, four hundred forty-five thousand, two hundred fifty".