221405034 has 8 divisors (see below), whose sum is σ = 442810080. Its totient is φ = 73801676.

The previous prime is 221405027. The next prime is 221405039. The reversal of 221405034 is 430504122.

It is a sphenic number, since it is the product of 3 distinct primes.

221405034 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 221405034.

It is not an unprimeable number, because it can be changed into a prime (221405039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18450414 + ... + 18450425.

It is an arithmetic number, because the mean of its divisors is an integer number (55351260).

Almost surely, 2^221405034 is an apocalyptic number.

221405034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221405034 is a wasteful number, since it uses less digits than its factorization.

221405034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36900844.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 221405034 is about 14879.6852789298. The cubic root of 221405034 is about 604.9634875399.

Adding to 221405034 its reverse (430504122), we get a palindrome (651909156).

The spelling of 221405034 in words is "two hundred twenty-one million, four hundred five thousand, thirty-four".