51922217 has 2 divisors, whose sum is σ = 51922218. Its totient is φ = 51922216.

The previous prime is 51922187. The next prime is 51922219. The reversal of 51922217 is 71222915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51036736 + 885481 = 7144^2 + 941^2 .

It is a cyclic number.

It is not a de Polignac number, because 51922217 - 2⁶ = 51922153 is a prime.

Together with 51922219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51922217.

It is not a weakly prime, because it can be changed into another prime (51922219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25961108 + 25961109.

It is an arithmetic number, because the mean of its divisors is an integer number (25961109).

Almost surely, 2^51922217 is an apocalyptic number.

It is an amenable number.

51922217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51922217 is an equidigital number, since it uses as much as digits as its factorization.

51922217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 51922217 is about 7205.7072518942. The cubic root of 51922217 is about 373.0649164543.

The spelling of 51922217 in words is "fifty-one million, nine hundred twenty-two thousand, two hundred seventeen".