212881919 has 2 divisors, whose sum is σ = 212881920. Its totient is φ = 212881918.

The previous prime is 212881913. The next prime is 212881967. The reversal of 212881919 is 919188212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212881919 - 2¹² = 212877823 is a prime.

It is a super-2 number, since 2×212881919² = 90637422874245122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212881913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106440959 + 106440960.

It is an arithmetic number, because the mean of its divisors is an integer number (106440960).

Almost surely, 2^212881919 is an apocalyptic number.

212881919 is a deficient number, since it is larger than the sum of its proper divisors (1).

212881919 is an equidigital number, since it uses as much as digits as its factorization.

212881919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 41.

The square root of 212881919 is about 14590.4735701073. The cubic root of 212881919 is about 597.0988831061.

The spelling of 212881919 in words is "two hundred twelve million, eight hundred eighty-one thousand, nine hundred nineteen".