212896861895 has 4 divisors (see below), whose sum is σ = 255476234280. Its totient is φ = 170317489512.

The previous prime is 212896861841. The next prime is 212896861897. The reversal of 212896861895 is 598168698212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212896861895 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212896861897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21289686185 + ... + 21289686194.

It is an arithmetic number, because the mean of its divisors is an integer number (63869058570).

Almost surely, 2^212896861895 is an apocalyptic number.

212896861895 is a deficient number, since it is larger than the sum of its proper divisors (42579372385).

212896861895 is an equidigital number, since it uses as much as digits as its factorization.

212896861895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42579372384.

The product of its digits is 29859840, while the sum is 65.

The spelling of 212896861895 in words is "two hundred twelve billion, eight hundred ninety-six million, eight hundred sixty-one thousand, eight hundred ninety-five".