131210320 has 40 divisors (see below), whose sum is σ = 305683560. Its totient is φ = 52377600.

The previous prime is 131210309. The next prime is 131210357. The reversal of 131210320 is 23012131.

It can be written as a sum of positive squares in 4 ways, for example, as 68293696 + 62916624 = 8264^2 + 7932^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×131210320² = 34432296149004800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131210320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46716 + ... + 49444.

It is an arithmetic number, because the mean of its divisors is an integer number (7642089).

Almost surely, 2^131210320 is an apocalyptic number.

131210320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131210320 is an abundant number, since it is smaller than the sum of its proper divisors (174473240).

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

131210320 is a wasteful number, since it uses less digits than its factorization.

131210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343 (or 3337 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 131210320 is about 11454.7073293035. The cubic root of 131210320 is about 508.1469597758.

Adding to 131210320 its reverse (23012131), we get a palindrome (154222451).

The spelling of 131210320 in words is "one hundred thirty-one million, two hundred ten thousand, three hundred twenty".