131020432 has 20 divisors (see below), whose sum is σ = 256368636. Its totient is φ = 64860800.

The previous prime is 131020387. The next prime is 131020433. The reversal of 131020432 is 234020131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 122235136 + 8785296 = 11056^2 + 2964^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (131020433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38923 + ... + 42154.

Almost surely, 2^131020432 is an apocalyptic number.

It is an amenable number.

131020432 is a deficient number, since it is larger than the sum of its proper divisors (125348204).

131020432 is a wasteful number, since it uses less digits than its factorization.

131020432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81186 (or 81180 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 131020432 is about 11446.4156835229. The cubic root of 131020432 is about 507.9017107874.

Adding to 131020432 its reverse (234020131), we get a palindrome (365040563).

The spelling of 131020432 in words is "one hundred thirty-one million, twenty thousand, four hundred thirty-two".