51196217 has 2 divisors, whose sum is σ = 51196218. Its totient is φ = 51196216.

The previous prime is 51196177. The next prime is 51196237. The reversal of 51196217 is 71269115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50282281 + 913936 = 7091^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 51196217 - 2⁶ = 51196153 is a prime.

It is a super-2 number, since 2×51196217² = 5242105270222178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51196237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25598108 + 25598109.

It is an arithmetic number, because the mean of its divisors is an integer number (25598109).

Almost surely, 2^51196217 is an apocalyptic number.

It is an amenable number.

51196217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51196217 is an equidigital number, since it uses as much as digits as its factorization.

51196217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 32.

The square root of 51196217 is about 7155.1531779550. The cubic root of 51196217 is about 371.3179610833.

The spelling of 51196217 in words is "fifty-one million, one hundred ninety-six thousand, two hundred seventeen".