2257720032015 has 40 divisors (see below), whose sum is σ = 4625339669280. Its totient is φ = 1032100584768.

The previous prime is 2257720031999. The next prime is 2257720032017. The reversal of 2257720032015 is 5102300277522.

2257720032015 is a `hidden beast` number, since 2 + 257 + 72 + 0 + 0 + 320 + 15 = 666.

It is not a de Polignac number, because 2257720032015 - 2⁴ = 2257720031999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257720032017) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 398184120 + ... + 398189789.

It is an arithmetic number, because the mean of its divisors is an integer number (115633491732).

Almost surely, 2^{2257720032015} is an apocalyptic number.

2257720032015 is an abundant number, since it is smaller than the sum of its proper divisors (2367619637265).

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

2257720032015 is an equidigital number, since it uses as much as digits as its factorization.

2257720032015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796373933 (or 796373924 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The spelling of 2257720032015 in words is "two trillion, two hundred fifty-seven billion, seven hundred twenty million, thirty-two thousand, fifteen".