212429805 has 16 divisors (see below), whose sum is σ = 388443264. Its totient is φ = 97110720.

The previous prime is 212429803. The next prime is 212429813. The reversal of 212429805 is 508924212.

It is not a de Polignac number, because 212429805 - 2¹ = 212429803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212429803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1011466 + ... + 1011675.

It is an arithmetic number, because the mean of its divisors is an integer number (24277704).

Almost surely, 2^212429805 is an apocalyptic number.

It is an amenable number.

212429805 is a deficient number, since it is larger than the sum of its proper divisors (176013459).

212429805 is a wasteful number, since it uses less digits than its factorization.

212429805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023156.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 212429805 is about 14574.9718696126. The cubic root of 212429805 is about 596.6758816272.

The spelling of 212429805 in words is "two hundred twelve million, four hundred twenty-nine thousand, eight hundred five".