221061822 has 16 divisors (see below), whose sum is σ = 444681360. Its totient is φ = 73260992.

The previous prime is 221061817. The next prime is 221061833. The reversal of 221061822 is 228160122.

It is a junction number, because it is equal to n+sod(n) for n = 221061792 and 221061801.

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, 105447 + ... + 107522.

It is an arithmetic number, because the mean of its divisors is an integer number (27792585).

Almost surely, 2^221061822 is an apocalyptic number.

221061822 is an abundant number, since it is smaller than the sum of its proper divisors (223619538).

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

221061822 is a wasteful number, since it uses less digits than its factorization.

221061822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213147.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 221061822 is about 14868.1479007979. The cubic root of 221061822 is about 604.6507302615.

The spelling of 221061822 in words is "two hundred twenty-one million, sixty-one thousand, eight hundred twenty-two".