52721222 has 8 divisors (see below), whose sum is σ = 79135056. Its totient is φ = 26342872.

The previous prime is 52721113. The next prime is 52721287. The reversal of 52721222 is 22212725.

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, 4778 + ... + 11325.

It is an arithmetic number, because the mean of its divisors is an integer number (9891882).

Almost surely, 2^52721222 is an apocalyptic number.

52721222 is a deficient number, since it is larger than the sum of its proper divisors (26413834).

52721222 is a wasteful number, since it uses less digits than its factorization.

52721222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17742.

The product of its digits is 1120, while the sum is 23.

The square root of 52721222 is about 7260.9380936626. The cubic root of 52721222 is about 374.9688199261.

Adding to 52721222 its reverse (22212725), we get a palindrome (74933947).

The spelling of 52721222 in words is "fifty-two million, seven hundred twenty-one thousand, two hundred twenty-two".