131422240 has 96 divisors (see below), whose sum is σ = 346187520. Its totient is φ = 46854144.

The previous prime is 131422231. The next prime is 131422271. The reversal of 131422240 is 42224131.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50409 + ... + 52951.

It is an arithmetic number, because the mean of its divisors is an integer number (3606120).

Almost surely, 2^131422240 is an apocalyptic number.

131422240 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 131422240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173093760).

131422240 is an abundant number, since it is smaller than the sum of its proper divisors (214765280).

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

131422240 is a wasteful number, since it uses less digits than its factorization.

131422240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594 (or 2586 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 131422240 is about 11463.9539426849. The cubic root of 131422240 is about 508.4203848647.

Adding to 131422240 its reverse (42224131), we get a palindrome (173646371).

The spelling of 131422240 in words is "one hundred thirty-one million, four hundred twenty-two thousand, two hundred forty".