221700690 has 48 divisors (see below), whose sum is σ = 589837248. Its totient is φ = 57744288.

The previous prime is 221700673. The next prime is 221700697. The reversal of 221700690 is 96007122.

221700690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221700690² = 98302391892952200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221700697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24774 + ... + 32513.

It is an arithmetic number, because the mean of its divisors is an integer number (12288276).

Almost surely, 2^221700690 is an apocalyptic number.

221700690 is an abundant number, since it is smaller than the sum of its proper divisors (368136558).

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

221700690 is a wasteful number, since it uses less digits than its factorization.

221700690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57343 (or 57340 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 221700690 is about 14889.6168520214. The cubic root of 221700690 is about 605.2326496359.

The spelling of 221700690 in words is "two hundred twenty-one million, seven hundred thousand, six hundred ninety".