131920650 has 60 divisors (see below), whose sum is σ = 366555222. Its totient is φ = 35177760.

The previous prime is 131920601. The next prime is 131920669. The reversal of 131920650 is 56029131.

131920650 is a `hidden beast` number, since 1 + 3 + 1 + 9 + 2 + 0 + 650 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 53012961 + 78907689 = 7281^2 + 8883^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 12237 + ... + 20336.

Almost surely, 2^131920650 is an apocalyptic number.

131920650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131920650 is an abundant number, since it is smaller than the sum of its proper divisors (234634572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131920650 is a wasteful number, since it uses less digits than its factorization.

131920650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32597 (or 32583 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 131920650 is about 11485.6715084491. The cubic root of 131920650 is about 509.0622907827.

Adding to 131920650 its reverse (56029131), we get a palindrome (187949781).

The spelling of 131920650 in words is "one hundred thirty-one million, nine hundred twenty thousand, six hundred fifty".