213633394 has 8 divisors (see below), whose sum is σ = 345100140. Its totient is φ = 98600016.

The previous prime is 213633347. The next prime is 213633403. The reversal of 213633394 is 493336312.

It can be written as a sum of positive squares in 2 ways, for example, as 213014025 + 619369 = 14595^2 + 787^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4108309 + ... + 4108360.

Almost surely, 2^213633394 is an apocalyptic number.

213633394 is a deficient number, since it is larger than the sum of its proper divisors (131466746).

213633394 is a wasteful number, since it uses less digits than its factorization.

213633394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8216684.

The product of its digits is 34992, while the sum is 34.

The square root of 213633394 is about 14616.2031321407. The cubic root of 213633394 is about 597.8006460692.

The spelling of 213633394 in words is "two hundred thirteen million, six hundred thirty-three thousand, three hundred ninety-four".