213630630 has 16 divisors (see below), whose sum is σ = 512713584. Its totient is φ = 56968160.

The previous prime is 213630583. The next prime is 213630667. The reversal of 213630630 is 36036312.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 213630630.

It is a congruent 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, 3560481 + ... + 3560540.

It is an arithmetic number, because the mean of its divisors is an integer number (32044599).

Almost surely, 2^213630630 is an apocalyptic number.

213630630 is an abundant number, since it is smaller than the sum of its proper divisors (299082954).

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

213630630 is a wasteful number, since it uses less digits than its factorization.

213630630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7121031.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 213630630 is about 14616.1085792354. The cubic root of 213630630 is about 597.7980679328.

Adding to 213630630 its reverse (36036312), we get a palindrome (249666942).

The spelling of 213630630 in words is "two hundred thirteen million, six hundred thirty thousand, six hundred thirty".