131797220 has 24 divisors (see below), whose sum is σ = 281998584. Its totient is φ = 51723776.

The previous prime is 131797217. The next prime is 131797231. The reversal of 131797220 is 22797131.

It can be written as a sum of positive squares in 4 ways, for example, as 4919524 + 126877696 = 2218^2 + 11264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61109 + ... + 63228.

It is an arithmetic number, because the mean of its divisors is an integer number (11749941).

Almost surely, 2^131797220 is an apocalyptic number.

131797220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131797220 is an abundant number, since it is smaller than the sum of its proper divisors (150201364).

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

131797220 is a wasteful number, since it uses less digits than its factorization.

131797220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124399 (or 124397 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 131797220 is about 11480.2970344848. The cubic root of 131797220 is about 508.9034751986.

The spelling of 131797220 in words is "one hundred thirty-one million, seven hundred ninety-seven thousand, two hundred twenty".