221289034 has 24 divisors (see below), whose sum is σ = 353940300. Its totient is φ = 103742976.

The previous prime is 221289031. The next prime is 221289059. The reversal of 221289034 is 430982122.

It can be written as a sum of positive squares in 6 ways, for example, as 174160809 + 47128225 = 13197^2 + 6865^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221288987 and 221289005.

It is not an unprimeable number, because it can be changed into a prime (221289031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201174 + ... + 202270.

Almost surely, 2^221289034 is an apocalyptic number.

221289034 is a deficient number, since it is larger than the sum of its proper divisors (132651266).

221289034 is a wasteful number, since it uses less digits than its factorization.

221289034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 221289034 is about 14875.7868363324. The cubic root of 221289034 is about 604.8578169167.

Subtracting from 221289034 its product of nonzero digits (6912), we obtain a palindrome (221282122).

The spelling of 221289034 in words is "two hundred twenty-one million, two hundred eighty-nine thousand, thirty-four".