131440564 has 6 divisors (see below), whose sum is σ = 230020994. Its totient is φ = 65720280.

The previous prime is 131440559. The next prime is 131440577. The reversal of 131440564 is 465044131.

It can be written as a sum of positive squares in only one way, i.e., 130644900 + 795664 = 11430^2 + 892^2 .

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, 16430067 + ... + 16430074.

Almost surely, 2^131440564 is an apocalyptic number.

It is an amenable number.

131440564 is a deficient number, since it is larger than the sum of its proper divisors (98580430).

131440564 is a wasteful number, since it uses less digits than its factorization.

131440564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32860145 (or 32860143 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 131440564 is about 11464.7531155276. The cubic root of 131440564 is about 508.4440131897. Note that the first 3 decimals are identical.

Adding to 131440564 its reverse (465044131), we get a palindrome (596484695).

The spelling of 131440564 in words is "one hundred thirty-one million, four hundred forty thousand, five hundred sixty-four".