131508890 has 16 divisors (see below), whose sum is σ = 238307400. Its totient is φ = 52249920.

The previous prime is 131508857. The next prime is 131508893. The reversal of 131508890 is 98805131.

It can be written as a sum of positive squares in 4 ways, for example, as 38328481 + 93180409 = 6191^2 + 9653^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131508890.

It is not an unprimeable number, because it can be changed into a prime (131508893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42641 + ... + 45620.

Almost surely, 2^131508890 is an apocalyptic number.

131508890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131508890 is a deficient number, since it is larger than the sum of its proper divisors (106798510).

131508890 is a wasteful number, since it uses less digits than its factorization.

131508890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88417.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 131508890 is about 11467.7325570489. The cubic root of 131508890 is about 508.5320984473.

The spelling of 131508890 in words is "one hundred thirty-one million, five hundred eight thousand, eight hundred ninety".