131563444 has 6 divisors (see below), whose sum is σ = 230236034. Its totient is φ = 65781720.

The previous prime is 131563433. The next prime is 131563463. The reversal of 131563444 is 444365131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 129686544 + 1876900 = 11388^2 + 1370^2 .

It is a super-2 number, since 2×131563444² = 34617879594282272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16445427 + ... + 16445434.

Almost surely, 2^131563444 is an apocalyptic number.

It is an amenable number.

131563444 is a deficient number, since it is larger than the sum of its proper divisors (98672590).

131563444 is a wasteful number, since it uses less digits than its factorization.

131563444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32890865 (or 32890863 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 131563444 is about 11470.1108974587. The cubic root of 131563444 is about 508.6024070651.

The spelling of 131563444 in words is "one hundred thirty-one million, five hundred sixty-three thousand, four hundred forty-four".