212516819 has 2 divisors, whose sum is σ = 212516820. Its totient is φ = 212516818.

The previous prime is 212516791. The next prime is 212516861. The reversal of 212516819 is 918615212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212516819 is a prime.

It is a super-2 number, since 2×212516819² = 90326796715757522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212516119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106258409 + 106258410.

It is an arithmetic number, because the mean of its divisors is an integer number (106258410).

Almost surely, 2^212516819 is an apocalyptic number.

212516819 is a deficient number, since it is larger than the sum of its proper divisors (1).

212516819 is an equidigital number, since it uses as much as digits as its factorization.

212516819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 212516819 is about 14577.9566126395. The cubic root of 212516819 is about 596.7573392297.

The spelling of 212516819 in words is "two hundred twelve million, five hundred sixteen thousand, eight hundred nineteen".