2113565257 has 8 divisors (see below), whose sum is σ = 2120174784. Its totient is φ = 2106966288.

The previous prime is 2113565227. The next prime is 2113565281. The reversal of 2113565257 is 7525653112.

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 2113565257 - 2¹⁵ = 2113532489 is a prime.

It is a super-3 number, since 3×2113565257³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113565227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583183 + ... + 586795.

It is an arithmetic number, because the mean of its divisors is an integer number (265021848).

Almost surely, 2^2113565257 is an apocalyptic number.

It is an amenable number.

2113565257 is a deficient number, since it is larger than the sum of its proper divisors (6609527).

2113565257 is a wasteful number, since it uses less digits than its factorization.

2113565257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5279.

The product of its digits is 63000, while the sum is 37.

The square root of 2113565257 is about 45973.5277850199. The cubic root of 2113565257 is about 1283.3306117819.

The spelling of 2113565257 in words is "two billion, one hundred thirteen million, five hundred sixty-five thousand, two hundred fifty-seven".