51222331 has 8 divisors (see below), whose sum is σ = 52557120. Its totient is φ = 49894152.

The previous prime is 51222317. The next prime is 51222361. The reversal of 51222331 is 13322215.

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 51222331 - 2⁵ = 51222299 is a prime.

It is a super-2 number, since 2×51222331² = 5247454386147122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51222299 and 51222308.

It is not an unprimeable number, because it can be changed into a prime (51222361) 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, 16596 + ... + 19438.

It is an arithmetic number, because the mean of its divisors is an integer number (6569640).

Almost surely, 2^51222331 is an apocalyptic number.

51222331 is a deficient number, since it is larger than the sum of its proper divisors (1334789).

51222331 is a wasteful number, since it uses less digits than its factorization.

51222331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305.

The product of its digits is 360, while the sum is 19.

The square root of 51222331 is about 7156.9777839532. The cubic root of 51222331 is about 371.3810839050.

Adding to 51222331 its reverse (13322215), we get a palindrome (64544546).

The spelling of 51222331 in words is "fifty-one million, two hundred twenty-two thousand, three hundred thirty-one".