213918930 has 24 divisors (see below), whose sum is σ = 556189452. Its totient is φ = 57045024.

The previous prime is 213918923. The next prime is 213918961. The reversal of 213918930 is 39819312.

It can be written as a sum of positive squares in 2 ways, for example, as 210221001 + 3697929 = 14499^2 + 1923^2 .

It is a super-2 number, since 2×213918930² = 91522617224689800, which contains 22 as substring.

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, 1188349 + ... + 1188528.

Almost surely, 2^213918930 is an apocalyptic number.

213918930 is an abundant number, since it is smaller than the sum of its proper divisors (342270522).

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

213918930 is a wasteful number, since it uses less digits than its factorization.

213918930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376890 (or 2376887 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 213918930 is about 14625.9676602952. The cubic root of 213918930 is about 598.0668616493.

The spelling of 213918930 in words is "two hundred thirteen million, nine hundred eighteen thousand, nine hundred thirty".