131032224 has 36 divisors (see below), whose sum is σ = 372623706. Its totient is φ = 43677312.

The previous prime is 131032211. The next prime is 131032259. The reversal of 131032224 is 422230131.

It can be written as a sum of positive squares in only one way, i.e., 125888400 + 5143824 = 11220^2 + 2268^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131032197 and 131032206.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227199 + ... + 227774.

Almost surely, 2^131032224 is an apocalyptic number.

It is an amenable number.

131032224 is an abundant number, since it is smaller than the sum of its proper divisors (241591482).

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

131032224 is a wasteful number, since it uses less digits than its factorization.

131032224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454989 (or 454978 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 131032224 is about 11446.9307676774. The cubic root of 131032224 is about 507.9169475898.

Adding to 131032224 its reverse (422230131), we get a palindrome (553262355).

The spelling of 131032224 in words is "one hundred thirty-one million, thirty-two thousand, two hundred twenty-four".