211564942057 has 8 divisors (see below), whose sum is σ = 241791757632. Its totient is φ = 181338939600.

The previous prime is 211564942037. The next prime is 211564942063. The reversal of 211564942057 is 750249465112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211564942057 - 2¹⁵ = 211564909289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211564941998 and 211564942016.

It is not an unprimeable number, because it can be changed into a prime (211564942037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531207 + ... + 839827.

It is an arithmetic number, because the mean of its divisors is an integer number (30223969704).

Almost surely, 2^211564942057 is an apocalyptic number.

It is an amenable number.

211564942057 is a deficient number, since it is larger than the sum of its proper divisors (30226815575).

211564942057 is an equidigital number, since it uses as much as digits as its factorization.

211564942057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406559.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 211564942057 in words is "two hundred eleven billion, five hundred sixty-four million, nine hundred forty-two thousand, fifty-seven".