212403434 has 16 divisors (see below), whose sum is σ = 325990656. Its totient is φ = 103748400.

The previous prime is 212403431. The next prime is 212403439. The reversal of 212403434 is 434304212.

It is not an unprimeable number, because it can be changed into a prime (212403431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57524 + ... + 61104.

It is an arithmetic number, because the mean of its divisors is an integer number (20374416).

Almost surely, 2^212403434 is an apocalyptic number.

212403434 is a deficient number, since it is larger than the sum of its proper divisors (113587222).

212403434 is a wasteful number, since it uses less digits than its factorization.

212403434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 212403434 is about 14574.0671742654. The cubic root of 212403434 is about 596.6511901912.

Adding to 212403434 its reverse (434304212), we get a palindrome (646707646).

The spelling of 212403434 in words is "two hundred twelve million, four hundred three thousand, four hundred thirty-four".