131981850 has 288 divisors, whose sum is σ = 477719424. Its totient is φ = 25228800.

The previous prime is 131981821. The next prime is 131981867. The reversal of 131981850 is 58189131.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 450304 + ... + 450596.

It is an arithmetic number, because the mean of its divisors is an integer number (1658748).

Almost surely, 2^131981850 is an apocalyptic number.

131981850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131981850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238859712).

131981850 is an abundant number, since it is smaller than the sum of its proper divisors (345737574).

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

131981850 is a wasteful number, since it uses less digits than its factorization.

131981850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 131981850 is about 11488.3353885583. The cubic root of 131981850 is about 509.1409991975.

The spelling of 131981850 in words is "one hundred thirty-one million, nine hundred eighty-one thousand, eight hundred fifty".