212256644513 has 2 divisors, whose sum is σ = 212256644514. Its totient is φ = 212256644512.

The previous prime is 212256644443. The next prime is 212256644527. The reversal of 212256644513 is 315446652212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110618103649 + 101638540864 = 332593^2 + 318808^2 .

It is a cyclic number.

It is not a de Polignac number, because 212256644513 - 2¹² = 212256640417 is a prime.

It is not a weakly prime, because it can be changed into another prime (212256644533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106128322256 + 106128322257.

It is an arithmetic number, because the mean of its divisors is an integer number (106128322257).

Almost surely, 2^212256644513 is an apocalyptic number.

It is an amenable number.

212256644513 is a deficient number, since it is larger than the sum of its proper divisors (1).

212256644513 is an equidigital number, since it uses as much as digits as its factorization.

212256644513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 41.

The spelling of 212256644513 in words is "two hundred twelve billion, two hundred fifty-six million, six hundred forty-four thousand, five hundred thirteen".