221423542 has 8 divisors (see below), whose sum is σ = 332210736. Its totient is φ = 110686632.

The previous prime is 221423539. The next prime is 221423561. The reversal of 221423542 is 245324122.

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

It is a congruent number.

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, 1663 + ... + 21109.

It is an arithmetic number, because the mean of its divisors is an integer number (41526342).

Almost surely, 2^221423542 is an apocalyptic number.

221423542 is a deficient number, since it is larger than the sum of its proper divisors (110787194).

221423542 is a wasteful number, since it uses less digits than its factorization.

221423542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25142.

The product of its digits is 3840, while the sum is 25.

The square root of 221423542 is about 14880.3071876894. The cubic root of 221423542 is about 604.9803440555.

Adding to 221423542 its reverse (245324122), we get a palindrome (466747664).

The spelling of 221423542 in words is "two hundred twenty-one million, four hundred twenty-three thousand, five hundred forty-two".