2256517197 has 96 divisors (see below), whose sum is σ = 3920017920. Its totient is φ = 1282806720.

The previous prime is 2256517183. The next prime is 2256517217. The reversal of 2256517197 is 7917156522.

It is a de Polignac number, because none of the positive numbers 2^k-2256517197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256517147) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7973418 + ... + 7973700.

It is an arithmetic number, because the mean of its divisors is an integer number (40833520).

Almost surely, 2^2256517197 is an apocalyptic number.

2256517197 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2256517197 is a deficient number, since it is larger than the sum of its proper divisors (1663500723).

2256517197 is a wasteful number, since it uses less digits than its factorization.

2256517197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 473 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 2256517197 is about 47502.8125167342. The cubic root of 2256517197 is about 1311.6346544099.

The spelling of 2256517197 in words is "two billion, two hundred fifty-six million, five hundred seventeen thousand, one hundred ninety-seven".