212057311 has 2 divisors, whose sum is σ = 212057312. Its totient is φ = 212057310.

The previous prime is 212057297. The next prime is 212057317. The reversal of 212057311 is 113750212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212057311 - 2¹³ = 212049119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212057317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106028655 + 106028656.

It is an arithmetic number, because the mean of its divisors is an integer number (106028656).

Almost surely, 2^212057311 is an apocalyptic number.

212057311 is a deficient number, since it is larger than the sum of its proper divisors (1).

212057311 is an equidigital number, since it uses as much as digits as its factorization.

212057311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 212057311 is about 14562.1877133898. The cubic root of 212057311 is about 596.3269220860.

The spelling of 212057311 in words is "two hundred twelve million, fifty-seven thousand, three hundred eleven".