131281290 has 96 divisors (see below), whose sum is σ = 407280960. Its totient is φ = 30004128.

The previous prime is 131281273. The next prime is 131281351. The reversal of 131281290 is 92182131.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8269 + ... + 18191.

It is an arithmetic number, because the mean of its divisors is an integer number (4242510).

Almost surely, 2^131281290 is an apocalyptic number.

131281290 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 131281290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203640480).

131281290 is an abundant number, since it is smaller than the sum of its proper divisors (275999670).

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

131281290 is a wasteful number, since it uses less digits than its factorization.

131281290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9953 (or 9940 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 131281290 is about 11457.8047635662. The cubic root of 131281290 is about 508.2385600138.

The spelling of 131281290 in words is "one hundred thirty-one million, two hundred eighty-one thousand, two hundred ninety".