131305400 has 24 divisors (see below), whose sum is σ = 305285520. Its totient is φ = 52522080.

The previous prime is 131305393. The next prime is 131305403. The reversal of 131305400 is 4503131.

It is a super-2 number, since 2×131305400² = 34482216138320000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131305403) 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 5 ways as a sum of consecutive naturals, for example, 328064 + ... + 328463.

It is an arithmetic number, because the mean of its divisors is an integer number (12720230).

Almost surely, 2^131305400 is an apocalyptic number.

131305400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131305400 is an abundant number, since it is smaller than the sum of its proper divisors (173980120).

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

131305400 is a wasteful number, since it uses less digits than its factorization.

131305400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656543 (or 656534 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 131305400 is about 11458.8568365261. The cubic root of 131305400 is about 508.2696710265.

Adding to 131305400 its reverse (4503131), we get a palindrome (135808531).

The spelling of 131305400 in words is "one hundred thirty-one million, three hundred five thousand, four hundred".