221320142 has 8 divisors (see below), whose sum is σ = 332730936. Its totient is φ = 110409832.

The previous prime is 221320079. The next prime is 221320153. The reversal of 221320142 is 241023122.

221320142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×221320142³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221320142.

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, 124013 + ... + 125784.

It is an arithmetic number, because the mean of its divisors is an integer number (41591367).

Almost surely, 2^221320142 is an apocalyptic number.

221320142 is a deficient number, since it is larger than the sum of its proper divisors (111410794).

221320142 is a wasteful number, since it uses less digits than its factorization.

221320142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250242.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221320142 is about 14876.8323913392. The cubic root of 221320142 is about 604.8861584858.

Adding to 221320142 its reverse (241023122), we get a palindrome (462343264).

The spelling of 221320142 in words is "two hundred twenty-one million, three hundred twenty thousand, one hundred forty-two".