131573444 has 6 divisors (see below), whose sum is σ = 230253534. Its totient is φ = 65786720.

The previous prime is 131573441. The next prime is 131573459. The reversal of 131573444 is 444375131.

It can be written as a sum of positive squares in only one way, i.e., 131560900 + 12544 = 11470^2 + 112^2 .

It is a super-2 number, since 2×131573444² = 34623142332042272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131573444.

It is not an unprimeable number, because it can be changed into a prime (131573441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16446677 + ... + 16446684.

It is an arithmetic number, because the mean of its divisors is an integer number (38375589).

Almost surely, 2^131573444 is an apocalyptic number.

It is an amenable number.

131573444 is a deficient number, since it is larger than the sum of its proper divisors (98680090).

131573444 is a wasteful number, since it uses less digits than its factorization.

131573444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32893365 (or 32893363 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 131573444 is about 11470.5468047517. The cubic root of 131573444 is about 508.6152928512.

The spelling of 131573444 in words is "one hundred thirty-one million, five hundred seventy-three thousand, four hundred forty-four".