131245216 has 24 divisors (see below), whose sum is σ = 265374900. Its totient is φ = 63848448.

The previous prime is 131245207. The next prime is 131245241. The reversal of 131245216 is 612542131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 95961616 + 35283600 = 9796^2 + 5940^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54241 + ... + 56608.

Almost surely, 2^131245216 is an apocalyptic number.

131245216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131245216 is an abundant number, since it is smaller than the sum of its proper divisors (134129684).

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

131245216 is a wasteful number, since it uses less digits than its factorization.

131245216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110896 (or 110888 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 131245216 is about 11456.2304446096. The cubic root of 131245216 is about 508.1920038052.

Adding to 131245216 its reverse (612542131), we get a palindrome (743787347).

The spelling of 131245216 in words is "one hundred thirty-one million, two hundred forty-five thousand, two hundred sixteen".