212403242 has 16 divisors (see below), whose sum is σ = 335694240. Its totient is φ = 100515888.

The previous prime is 212403179. The next prime is 212403283. The reversal of 212403242 is 242304212.

212403242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212403242² = 90230274424221128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52268 + ... + 56184.

It is an arithmetic number, because the mean of its divisors is an integer number (20980890).

Almost surely, 2^212403242 is an apocalyptic number.

212403242 is a deficient number, since it is larger than the sum of its proper divisors (123290998).

212403242 is a wasteful number, since it uses less digits than its factorization.

212403242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5365.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 212403242 is about 14574.0605872214. The cubic root of 212403242 is about 596.6510104121.

Adding to 212403242 its reverse (242304212), we get a palindrome (454707454).

The spelling of 212403242 in words is "two hundred twelve million, four hundred three thousand, two hundred forty-two".