131440430 has 32 divisors (see below), whose sum is σ = 273287520. Its totient is φ = 44984320.

The previous prime is 131440427. The next prime is 131440433. The reversal of 131440430 is 34044131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131440427) and next prime (131440433).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33275 + ... + 37014.

It is an arithmetic number, because the mean of its divisors is an integer number (8540235).

Almost surely, 2^131440430 is an apocalyptic number.

131440430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131440430 is an abundant number, since it is smaller than the sum of its proper divisors (141847090).

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

131440430 is a wasteful number, since it uses less digits than its factorization.

131440430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70324.

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

The square root of 131440430 is about 11464.7472715276. The cubic root of 131440430 is about 508.4438404081.

Adding to 131440430 its reverse (34044131), we get a palindrome (165484561).

The spelling of 131440430 in words is "one hundred thirty-one million, four hundred forty thousand, four hundred thirty".