51222233 has 8 divisors (see below), whose sum is σ = 53985600. Its totient is φ = 48465648.

The previous prime is 51222211. The next prime is 51222247. The reversal of 51222233 is 33222215.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51222233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51222253) 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, 23723 + ... + 25791.

It is an arithmetic number, because the mean of its divisors is an integer number (6748200).

Almost surely, 2^51222233 is an apocalyptic number.

It is an amenable number.

51222233 is a deficient number, since it is larger than the sum of its proper divisors (2763367).

51222233 is a wasteful number, since it uses less digits than its factorization.

51222233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391.

The product of its digits is 720, while the sum is 20.

The square root of 51222233 is about 7156.9709374847. The cubic root of 51222233 is about 371.3808470593.

Adding to 51222233 its reverse (33222215), we get a palindrome (84444448).

The spelling of 51222233 in words is "fifty-one million, two hundred twenty-two thousand, two hundred thirty-three".