131685650 has 12 divisors (see below), whose sum is σ = 244935402. Its totient is φ = 52674240.

The previous prime is 131685611. The next prime is 131685661. The reversal of 131685650 is 56586131.

It can be written as a sum of positive squares in 3 ways, for example, as 81884401 + 49801249 = 9049^2 + 7057^2 .

It is a super-2 number, since 2×131685650² = 34682220831845000, 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 131685650.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1316807 + ... + 1316906.

Almost surely, 2^131685650 is an apocalyptic number.

131685650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131685650 is a deficient number, since it is larger than the sum of its proper divisors (113249752).

131685650 is a wasteful number, since it uses less digits than its factorization.

131685650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633725 (or 2633720 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 131685650 is about 11475.4368108582. The cubic root of 131685650 is about 508.7598343597.

The spelling of 131685650 in words is "one hundred thirty-one million, six hundred eighty-five thousand, six hundred fifty".