213039290 has 16 divisors (see below), whose sum is σ = 384154920. Its totient is φ = 85063680.

The previous prime is 213039289. The next prime is 213039313. The reversal of 213039290 is 92930312.

It can be written as a sum of positive squares in 4 ways, for example, as 139027681 + 74011609 = 11791^2 + 8603^2 .

It is a Curzon number.

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, 13031 + ... + 24410.

Almost surely, 2^213039290 is an apocalyptic number.

213039290 is a deficient number, since it is larger than the sum of its proper divisors (171115630).

213039290 is a wasteful number, since it uses less digits than its factorization.

213039290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38017.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 213039290 is about 14595.8655104793. The cubic root of 213039290 is about 597.2459801506.

The spelling of 213039290 in words is "two hundred thirteen million, thirty-nine thousand, two hundred ninety".