212634433 has 4 divisors (see below), whose sum is σ = 231964848. Its totient is φ = 193304020.

The previous prime is 212634413. The next prime is 212634451. The reversal of 212634433 is 334436212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212634433 - 2²¹ = 210537281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212634413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9665191 + ... + 9665212.

It is an arithmetic number, because the mean of its divisors is an integer number (57991212).

Almost surely, 2^212634433 is an apocalyptic number.

It is an amenable number.

212634433 is a deficient number, since it is larger than the sum of its proper divisors (19330415).

212634433 is a wasteful number, since it uses less digits than its factorization.

212634433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19330414.

The product of its digits is 10368, while the sum is 28.

The square root of 212634433 is about 14581.9900219414. The cubic root of 212634433 is about 596.8674074964.

The spelling of 212634433 in words is "two hundred twelve million, six hundred thirty-four thousand, four hundred thirty-three".