51453217 has 2 divisors, whose sum is σ = 51453218. Its totient is φ = 51453216.

The previous prime is 51453187. The next prime is 51453223. The reversal of 51453217 is 71235415.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51322896 + 130321 = 7164^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 51453217 - 2¹⁵ = 51420449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51453257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25726608 + 25726609.

It is an arithmetic number, because the mean of its divisors is an integer number (25726609).

Almost surely, 2^51453217 is an apocalyptic number.

It is an amenable number.

51453217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51453217 is an equidigital number, since it uses as much as digits as its factorization.

51453217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 28.

The square root of 51453217 is about 7173.0897805618. The cubic root of 51453217 is about 371.9382509177.

The spelling of 51453217 in words is "fifty-one million, four hundred fifty-three thousand, two hundred seventeen".