212408805 has 32 divisors (see below), whose sum is σ = 389055744. Its totient is φ = 96938496.

The previous prime is 212408797. The next prime is 212408813. The reversal of 212408805 is 508804212.

212408805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212408797) and next prime (212408813).

It is not a de Polignac number, because 212408805 - 2³ = 212408797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79857 + ... + 82473.

It is an arithmetic number, because the mean of its divisors is an integer number (12157992).

Almost surely, 2^212408805 is an apocalyptic number.

It is an amenable number.

212408805 is a deficient number, since it is larger than the sum of its proper divisors (176646939).

212408805 is a wasteful number, since it uses less digits than its factorization.

212408805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 212408805 is about 14574.2514387532. The cubic root of 212408805 is about 596.6562192789.

The spelling of 212408805 in words is "two hundred twelve million, four hundred eight thousand, eight hundred five".