221906034 has 32 divisors (see below), whose sum is σ = 563571840. Its totient is φ = 63401616.

The previous prime is 221906033. The next prime is 221906051. The reversal of 221906034 is 430609122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221905989 and 221906007.

It is not an unprimeable number, because it can be changed into a prime (221906033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293149 + ... + 293904.

It is an arithmetic number, because the mean of its divisors is an integer number (17611620).

Almost surely, 2^221906034 is an apocalyptic number.

221906034 is an abundant number, since it is smaller than the sum of its proper divisors (341665806).

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

221906034 is a wasteful number, since it uses less digits than its factorization.

221906034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587071 (or 587065 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 221906034 is about 14896.5107995128. The cubic root of 221906034 is about 605.4194518547.

It can be divided in two parts, 22190 and 6034, that added together give a square (28224 = 168²).

The spelling of 221906034 in words is "two hundred twenty-one million, nine hundred six thousand, thirty-four".