212955105 has 16 divisors (see below), whose sum is σ = 371703744. Its totient is φ = 103250880.

The previous prime is 212955101. The next prime is 212955109. The reversal of 212955105 is 501559212.

It is an interprime number because it is at equal distance from previous prime (212955101) and next prime (212955109).

It is not a de Polignac number, because 212955105 - 2² = 212955101 is a prime.

It is a super-2 number, since 2×212955105² = 90699753491122050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212955101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 645154 + ... + 645483.

It is an arithmetic number, because the mean of its divisors is an integer number (23231484).

Almost surely, 2^212955105 is an apocalyptic number.

It is an amenable number.

212955105 is a deficient number, since it is larger than the sum of its proper divisors (158748639).

212955105 is a wasteful number, since it uses less digits than its factorization.

212955105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290656.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 212955105 is about 14592.9813609146. The cubic root of 212955105 is about 597.1673001770.

The spelling of 212955105 in words is "two hundred twelve million, nine hundred fifty-five thousand, one hundred five".