213264490 has 16 divisors (see below), whose sum is σ = 406457352. Its totient is φ = 80287744.

The previous prime is 213264481. The next prime is 213264509. The reversal of 213264490 is 94462312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 204461401 + 8803089 = 14299^2 + 2967^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627079 + ... + 627418.

Almost surely, 2^213264490 is an apocalyptic number.

213264490 is a deficient number, since it is larger than the sum of its proper divisors (193192862).

213264490 is a wasteful number, since it uses less digits than its factorization.

213264490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254521.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 213264490 is about 14603.5779862334. The cubic root of 213264490 is about 597.4563520341.

The spelling of 213264490 in words is "two hundred thirteen million, two hundred sixty-four thousand, four hundred ninety".