212575804657 has 2 divisors, whose sum is σ = 212575804658. Its totient is φ = 212575804656.

The previous prime is 212575804631. The next prime is 212575804687. The reversal of 212575804657 is 756408575212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193973299776 + 18602504881 = 440424^2 + 136391^2 .

It is a cyclic number.

It is not a de Polignac number, because 212575804657 - 2²³ = 212567416049 is a prime.

It is not a weakly prime, because it can be changed into another prime (212575804687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106287902328 + 106287902329.

It is an arithmetic number, because the mean of its divisors is an integer number (106287902329).

Almost surely, 2^212575804657 is an apocalyptic number.

It is an amenable number.

212575804657 is a deficient number, since it is larger than the sum of its proper divisors (1).

212575804657 is an equidigital number, since it uses as much as digits as its factorization.

212575804657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704000, while the sum is 52.

The spelling of 212575804657 in words is "two hundred twelve billion, five hundred seventy-five million, eight hundred four thousand, six hundred fifty-seven".