221414742 has 48 divisors (see below), whose sum is σ = 498505680. Its totient is φ = 72842688.

The previous prime is 221414731. The next prime is 221414777. The reversal of 221414742 is 247414122.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1279768 + ... + 1279940.

It is an arithmetic number, because the mean of its divisors is an integer number (10385535).

Almost surely, 2^221414742 is an apocalyptic number.

221414742 is an abundant number, since it is smaller than the sum of its proper divisors (277090938).

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

221414742 is a wasteful number, since it uses less digits than its factorization.

221414742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 315 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 221414742 is about 14880.0114919310. The cubic root of 221414742 is about 604.9723294040.

Adding to 221414742 its reverse (247414122), we get a palindrome (468828864).

The spelling of 221414742 in words is "two hundred twenty-one million, four hundred fourteen thousand, seven hundred forty-two".