131640562 has 8 divisors (see below), whose sum is σ = 200698092. Its totient is φ = 64741200.

The previous prime is 131640559. The next prime is 131640577. The reversal of 131640562 is 265046131.

It can be written as a sum of positive squares in 2 ways, for example, as 78481881 + 53158681 = 8859^2 + 7291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 131640562.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539389 + ... + 539632.

Almost surely, 2^131640562 is an apocalyptic number.

131640562 is a deficient number, since it is larger than the sum of its proper divisors (69057530).

131640562 is a wasteful number, since it uses less digits than its factorization.

131640562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079084.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 131640562 is about 11473.4720987154. The cubic root of 131640562 is about 508.7017627780.

Adding to 131640562 its reverse (265046131), we get a palindrome (396686693).

The spelling of 131640562 in words is "one hundred thirty-one million, six hundred forty thousand, five hundred sixty-two".