221034402 has 24 divisors (see below), whose sum is σ = 494357760. Its totient is φ = 71301240.

The previous prime is 221034397. The next prime is 221034419. The reversal of 221034402 is 204430122.

221034402 is a `hidden beast` number, since 221 + 0 + 3 + 440 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 197502 + ... + 198617.

It is an arithmetic number, because the mean of its divisors is an integer number (20598240).

Almost surely, 2^221034402 is an apocalyptic number.

221034402 is an abundant number, since it is smaller than the sum of its proper divisors (273323358).

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

221034402 is a wasteful number, since it uses less digits than its factorization.

221034402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396158 (or 396155 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 221034402 is about 14867.2257667663. The cubic root of 221034402 is about 604.6257293992.

Adding to 221034402 its reverse (204430122), we get a palindrome (425464524).

The spelling of 221034402 in words is "two hundred twenty-one million, thirty-four thousand, four hundred two".