221142442 has 8 divisors (see below), whose sum is σ = 334934496. Its totient is φ = 109497612.

The previous prime is 221142431. The next prime is 221142491. The reversal of 221142442 is 244241122.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536548 + ... + 536959.

It is an arithmetic number, because the mean of its divisors is an integer number (41866812).

Almost surely, 2^221142442 is an apocalyptic number.

221142442 is a deficient number, since it is larger than the sum of its proper divisors (113792054).

221142442 is a wasteful number, since it uses less digits than its factorization.

221142442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073612.

The product of its digits is 1024, while the sum is 22.

The square root of 221142442 is about 14870.8588185081. The cubic root of 221142442 is about 604.7242255651.

Adding to 221142442 its reverse (244241122), we get a palindrome (465383564).

The spelling of 221142442 in words is "two hundred twenty-one million, one hundred forty-two thousand, four hundred forty-two".