221142310 has 8 divisors (see below), whose sum is σ = 398056176. Its totient is φ = 88456920.

The previous prime is 221142293. The next prime is 221142343. The reversal of 221142310 is 13241122.

221142310 is digitally balanced in base 3, 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-2 number, since 2×221142310² = 97807842544272200, which contains 22 as substring.

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, 11057106 + ... + 11057125.

It is an arithmetic number, because the mean of its divisors is an integer number (49757022).

Almost surely, 2^221142310 is an apocalyptic number.

221142310 is a deficient number, since it is larger than the sum of its proper divisors (176913866).

221142310 is a wasteful number, since it uses less digits than its factorization.

221142310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22114238.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221142310 is about 14870.8543802971. The cubic root of 221142310 is about 604.7241052451.

Adding to 221142310 its reverse (13241122), we get a palindrome (234383432).

It can be divided in two parts, 2211 and 42310, that added together give a square (44521 = 211²).

The spelling of 221142310 in words is "two hundred twenty-one million, one hundred forty-two thousand, three hundred ten".