212717572257 has 4 divisors (see below), whose sum is σ = 283623429680. Its totient is φ = 141811714836.

The previous prime is 212717572253. The next prime is 212717572259. The reversal of 212717572257 is 752275717212.

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 not a de Polignac number, because 212717572257 - 2² = 212717572253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212717572253) 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, 35452928707 + ... + 35452928712.

It is an arithmetic number, because the mean of its divisors is an integer number (70905857420).

Almost surely, 2^212717572257 is an apocalyptic number.

It is an amenable number.

212717572257 is a deficient number, since it is larger than the sum of its proper divisors (70905857423).

212717572257 is an equidigital number, since it uses as much as digits as its factorization.

212717572257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70905857422.

The product of its digits is 960400, while the sum is 48.

The spelling of 212717572257 in words is "two hundred twelve billion, seven hundred seventeen million, five hundred seventy-two thousand, two hundred fifty-seven".