131534440 has 32 divisors (see below), whose sum is σ = 313363080. Its totient is φ = 49518592.

The previous prime is 131534419. The next prime is 131534461. The reversal of 131534440 is 44435131.

It is an interprime number because it is at equal distance from previous prime (131534419) and next prime (131534461).

It can be written as a sum of positive squares in 4 ways, for example, as 83064996 + 48469444 = 9114^2 + 6962^2 .

It is a super-2 number, since 2×131534440² = 34602617812227200, which contains 22 as substring.

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, 96037 + ... + 97396.

Almost surely, 2^131534440 is an apocalyptic number.

131534440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131534440 is an abundant number, since it is smaller than the sum of its proper divisors (181828640).

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

131534440 is a wasteful number, since it uses less digits than its factorization.

131534440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193461 (or 193457 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 131534440 is about 11468.8464982316. The cubic root of 131534440 is about 508.5650294372.

Adding to 131534440 its reverse (44435131), we get a palindrome (175969571).

The spelling of 131534440 in words is "one hundred thirty-one million, five hundred thirty-four thousand, four hundred forty".