2113201857 has 24 divisors (see below), whose sum is σ = 3079084800. Its totient is φ = 1288467648.

The previous prime is 2113201837. The next prime is 2113201873. The reversal of 2113201857 is 7581023112.

It is not a de Polignac number, because 2113201857 - 2⁷ = 2113201729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2113201807) 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 23 ways as a sum of consecutive naturals, for example, 36144 + ... + 74382.

It is an arithmetic number, because the mean of its divisors is an integer number (128295200).

Almost surely, 2^2113201857 is an apocalyptic number.

It is an amenable number.

2113201857 is a deficient number, since it is larger than the sum of its proper divisors (965882943).

2113201857 is a wasteful number, since it uses less digits than its factorization.

2113201857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38377 (or 38364 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 2113201857 is about 45969.5753406533. The cubic root of 2113201857 is about 1283.2570569084.

Adding to 2113201857 its reverse (7581023112), we get a palindrome (9694224969).

The spelling of 2113201857 in words is "two billion, one hundred thirteen million, two hundred one thousand, eight hundred fifty-seven".