213330042 has 24 divisors (see below), whose sum is σ = 489404916. Its totient is φ = 66926976.

The previous prime is 213330031. The next prime is 213330071. The reversal of 213330042 is 240033312.

It can be written as a sum of positive squares in 2 ways, for example, as 208831401 + 4498641 = 14451^2 + 2121^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 213329997 and 213330024.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348273 + ... + 348884.

Almost surely, 2^213330042 is an apocalyptic number.

213330042 is an abundant number, since it is smaller than the sum of its proper divisors (276074874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213330042 is a wasteful number, since it uses less digits than its factorization.

213330042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697182 (or 697179 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 213330042 is about 14605.8221952754. The cubic root of 213330042 is about 597.5175599841.

Adding to 213330042 its reverse (240033312), we get a palindrome (453363354).

The spelling of 213330042 in words is "two hundred thirteen million, three hundred thirty thousand, forty-two".