131217277 has 8 divisors (see below), whose sum is σ = 137139264. Its totient is φ = 125313408.

The previous prime is 131217259. The next prime is 131217299. The reversal of 131217277 is 772712131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131217277 - 2¹⁵ = 131184509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131217227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11533 + ... + 19885.

It is an arithmetic number, because the mean of its divisors is an integer number (17142408).

Almost surely, 2^131217277 is an apocalyptic number.

It is an amenable number.

131217277 is a deficient number, since it is larger than the sum of its proper divisors (5921987).

131217277 is an equidigital number, since it uses as much as digits as its factorization.

131217277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9059.

The product of its digits is 4116, while the sum is 31.

The square root of 131217277 is about 11455.0109995582. The cubic root of 131217277 is about 508.1559405631.

The spelling of 131217277 in words is "one hundred thirty-one million, two hundred seventeen thousand, two hundred seventy-seven".