51102223 has 2 divisors, whose sum is σ = 51102224. Its totient is φ = 51102222.

The previous prime is 51102211. The next prime is 51102253. The reversal of 51102223 is 32220115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51102223 - 2²¹ = 49005071 is a prime.

It is a super-2 number, since 2×51102223² = 5222874391083458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51102197 and 51102206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51102203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25551111 + 25551112.

It is an arithmetic number, because the mean of its divisors is an integer number (25551112).

Almost surely, 2^51102223 is an apocalyptic number.

51102223 is a deficient number, since it is larger than the sum of its proper divisors (1).

51102223 is an equidigital number, since it uses as much as digits as its factorization.

51102223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51102223 is about 7148.5818873396. The cubic root of 51102223 is about 371.0905807311.

Adding to 51102223 its reverse (32220115), we get a palindrome (83322338).

The spelling of 51102223 in words is "fifty-one million, one hundred two thousand, two hundred twenty-three".