212157983 has 2 divisors, whose sum is σ = 212157984. Its totient is φ = 212157982.

The previous prime is 212157937. The next prime is 212157989. The reversal of 212157983 is 389751212.

212157983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212157983 - 2²⁰ = 211109407 is a prime.

It is a super-2 number, since 2×212157983² = 90022019501256578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212157989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106078991 + 106078992.

It is an arithmetic number, because the mean of its divisors is an integer number (106078992).

Almost surely, 2^212157983 is an apocalyptic number.

212157983 is a deficient number, since it is larger than the sum of its proper divisors (1).

212157983 is an equidigital number, since it uses as much as digits as its factorization.

212157983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 212157983 is about 14565.6439267202. The cubic root of 212157983 is about 596.4212738221.

The spelling of 212157983 in words is "two hundred twelve million, one hundred fifty-seven thousand, nine hundred eighty-three".