212432890 has 16 divisors (see below), whose sum is σ = 391706280. Its totient is φ = 82900480.

The previous prime is 212432839. The next prime is 212432893. The reversal of 212432890 is 98234212.

It can be written as a sum of positive squares in 4 ways, for example, as 105124009 + 107308881 = 10253^2 + 10359^2 .

It is not an unprimeable number, because it can be changed into a prime (212432893) 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, 258655 + ... + 259474.

Almost surely, 2^212432890 is an apocalyptic number.

212432890 is a deficient number, since it is larger than the sum of its proper divisors (179273390).

212432890 is a wasteful number, since it uses less digits than its factorization.

212432890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518177.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 212432890 is about 14575.0777013366. The cubic root of 212432890 is about 596.6787700106.

The spelling of 212432890 in words is "two hundred twelve million, four hundred thirty-two thousand, eight hundred ninety".