212264857 has 4 divisors (see below), whose sum is σ = 242588416. Its totient is φ = 181941300.

The previous prime is 212264851. The next prime is 212264867. The reversal of 212264857 is 758462212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212264857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212264851) 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, 15161769 + ... + 15161782.

It is an arithmetic number, because the mean of its divisors is an integer number (60647104).

Almost surely, 2^212264857 is an apocalyptic number.

It is an amenable number.

212264857 is a deficient number, since it is larger than the sum of its proper divisors (30323559).

212264857 is an equidigital number, since it uses as much as digits as its factorization.

212264857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30323558.

The product of its digits is 53760, while the sum is 37.

The square root of 212264857 is about 14569.3121663310. The cubic root of 212264857 is about 596.5214055353.

The spelling of 212264857 in words is "two hundred twelve million, two hundred sixty-four thousand, eight hundred fifty-seven".