131231650 has 48 divisors (see below), whose sum is σ = 267572160. Its totient is φ = 47489600.

The previous prime is 131231647. The next prime is 131231669. The reversal of 131231650 is 56132131.

It is a happy number.

131231650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147507 + ... + 148393.

It is an arithmetic number, because the mean of its divisors is an integer number (5574420).

Almost surely, 2^131231650 is an apocalyptic number.

131231650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131231650 is an abundant number, since it is smaller than the sum of its proper divisors (136340510).

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

131231650 is a wasteful number, since it uses less digits than its factorization.

131231650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131231650 is about 11455.6383497385. The cubic root of 131231650 is about 508.1744936552.

Adding to 131231650 its reverse (56132131), we get a palindrome (187363781).

The spelling of 131231650 in words is "one hundred thirty-one million, two hundred thirty-one thousand, six hundred fifty".