131503400 has 192 divisors, whose sum is σ = 374976000. Its totient is φ = 41932800.

The previous prime is 131503391. The next prime is 131503409. The reversal of 131503400 is 4305131.

It is an interprime number because it is at equal distance from previous prime (131503391) and next prime (131503409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131503409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1664561 + ... + 1664639.

It is an arithmetic number, because the mean of its divisors is an integer number (1953000).

Almost surely, 2^131503400 is an apocalyptic number.

131503400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131503400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187488000).

131503400 is an abundant number, since it is smaller than the sum of its proper divisors (243472600).

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

131503400 is a wasteful number, since it uses less digits than its factorization.

131503400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 163 counting only the distinct ones).

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

The square root of 131503400 is about 11467.4931872663. The cubic root of 131503400 is about 508.5250219167.

Adding to 131503400 its reverse (4305131), we get a palindrome (135808531).

The spelling of 131503400 in words is "one hundred thirty-one million, five hundred three thousand, four hundred".