2720317257 has 32 divisors (see below), whose sum is σ = 4619212800. Its totient is φ = 1549949904.

The previous prime is 2720317231. The next prime is 2720317283. The reversal of 2720317257 is 7527130272.

It is an interprime number because it is at equal distance from previous prime (2720317231) and next prime (2720317283).

It is not a de Polignac number, because 2720317257 - 2¹⁰ = 2720316233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2720317207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44844 + ... + 86322.

It is an arithmetic number, because the mean of its divisors is an integer number (144350400).

Almost surely, 2^2720317257 is an apocalyptic number.

2720317257 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2720317257 is a deficient number, since it is larger than the sum of its proper divisors (1898895543).

2720317257 is a wasteful number, since it uses less digits than its factorization.

2720317257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41842 (or 41836 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 2720317257 is about 52156.6607155788. The cubic root of 2720317257 is about 1395.9606794630.

The spelling of 2720317257 in words is "two billion, seven hundred twenty million, three hundred seventeen thousand, two hundred fifty-seven".