212844157 has 2 divisors, whose sum is σ = 212844158. Its totient is φ = 212844156.

The previous prime is 212844113. The next prime is 212844169. The reversal of 212844157 is 751448212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186568281 + 26275876 = 13659^2 + 5126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212844157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212844187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106422078 + 106422079.

It is an arithmetic number, because the mean of its divisors is an integer number (106422079).

Almost surely, 2^212844157 is an apocalyptic number.

It is an amenable number.

212844157 is a deficient number, since it is larger than the sum of its proper divisors (1).

212844157 is an equidigital number, since it uses as much as digits as its factorization.

212844157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 34.

The square root of 212844157 is about 14589.1794491671. The cubic root of 212844157 is about 597.0635756119.

The spelling of 212844157 in words is "two hundred twelve million, eight hundred forty-four thousand, one hundred fifty-seven".