212434431 has 16 divisors (see below), whose sum is σ = 327172608. Its totient is φ = 121174400.

The previous prime is 212434403. The next prime is 212434471. The reversal of 212434431 is 134434212.

It is a cyclic number.

It is not a de Polignac number, because 212434431 - 2⁵ = 212434399 is a prime.

It is a super-2 number, since 2×212434431² = 90256774948587522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212434471) 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, 188775 + ... + 189896.

It is an arithmetic number, because the mean of its divisors is an integer number (20448288).

Almost surely, 2^212434431 is an apocalyptic number.

212434431 is a deficient number, since it is larger than the sum of its proper divisors (114738177).

212434431 is a wasteful number, since it uses less digits than its factorization.

212434431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378702.

The product of its digits is 2304, while the sum is 24.

The square root of 212434431 is about 14575.1305654529. The cubic root of 212434431 is about 596.6802127875.

Adding to 212434431 its reverse (134434212), we get a palindrome (346868643).

The spelling of 212434431 in words is "two hundred twelve million, four hundred thirty-four thousand, four hundred thirty-one".