131234240 has 56 divisors (see below), whose sum is σ = 317217552. Its totient is φ = 51701760.

The previous prime is 131234239. The next prime is 131234261. The reversal of 131234240 is 42432131.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 18380 + ... + 24500.

Almost surely, 2^131234240 is an apocalyptic number.

131234240 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 131234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158608776).

131234240 is an abundant number, since it is smaller than the sum of its proper divisors (185983312).

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

131234240 is an equidigital number, since it uses as much as digits as its factorization.

131234240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6205 (or 6195 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 131234240 is about 11455.7513939506. The cubic root of 131234240 is about 508.1778367595.

Adding to 131234240 its reverse (42432131), we get a palindrome (173666371).

The spelling of 131234240 in words is "one hundred thirty-one million, two hundred thirty-four thousand, two hundred forty".