51445223 has 2 divisors, whose sum is σ = 51445224. Its totient is φ = 51445222.

The previous prime is 51445193. The next prime is 51445231. The reversal of 51445223 is 32254415.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51445223 - 2¹⁰ = 51444199 is a prime.

It is a super-2 number, since 2×51445223² = 5293221939039458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51445192 and 51445201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51445423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25722611 + 25722612.

It is an arithmetic number, because the mean of its divisors is an integer number (25722612).

Almost surely, 2^51445223 is an apocalyptic number.

51445223 is a deficient number, since it is larger than the sum of its proper divisors (1).

51445223 is an equidigital number, since it uses as much as digits as its factorization.

51445223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 26.

The square root of 51445223 is about 7172.5325373957. The cubic root of 51445223 is about 371.9189879280.

Adding to 51445223 its reverse (32254415), we get a palindrome (83699638).

The spelling of 51445223 in words is "fifty-one million, four hundred forty-five thousand, two hundred twenty-three".