51112223 has 8 divisors (see below), whose sum is σ = 54606720. Its totient is φ = 47698200.

The previous prime is 51112219. The next prime is 51112247. The reversal of 51112223 is 32221115.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51112223 - 2² = 51112219 is a prime.

It is a super-2 number, since 2×51112223² = 5224918680003458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51112283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18803 + ... + 21348.

It is an arithmetic number, because the mean of its divisors is an integer number (6825840).

Almost surely, 2^51112223 is an apocalyptic number.

51112223 is a deficient number, since it is larger than the sum of its proper divisors (3494497).

51112223 is a wasteful number, since it uses less digits than its factorization.

51112223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40237.

The product of its digits is 120, while the sum is 17.

The square root of 51112223 is about 7149.2812925496. The cubic root of 51112223 is about 371.1147849213.

Adding to 51112223 its reverse (32221115), we get a palindrome (83333338).

The spelling of 51112223 in words is "fifty-one million, one hundred twelve thousand, two hundred twenty-three".