212434257 has 24 divisors (see below), whose sum is σ = 330372000. Its totient is φ = 121066176.

The previous prime is 212434253. The next prime is 212434273. The reversal of 212434257 is 752434212.

It is not a de Polignac number, because 212434257 - 2² = 212434253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212434253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59869 + ... + 63317.

It is an arithmetic number, because the mean of its divisors is an integer number (13765500).

Almost surely, 2^212434257 is an apocalyptic number.

It is an amenable number.

212434257 is a deficient number, since it is larger than the sum of its proper divisors (117937743).

212434257 is a wasteful number, since it uses less digits than its factorization.

212434257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885 (or 3878 counting only the distinct ones).

The product of its digits is 13440, while the sum is 30.

The square root of 212434257 is about 14575.1245963800. The cubic root of 212434257 is about 596.6800498786.

Adding to 212434257 its reverse (752434212), we get a palindrome (964868469).

The spelling of 212434257 in words is "two hundred twelve million, four hundred thirty-four thousand, two hundred fifty-seven".