51633217 has 2 divisors, whose sum is σ = 51633218. Its totient is φ = 51633216.

The previous prime is 51633181. The next prime is 51633223. The reversal of 51633217 is 71233615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41873841 + 9759376 = 6471^2 + 3124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51633217 is a prime.

It is not a weakly prime, because it can be changed into another prime (51633287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25816608 + 25816609.

It is an arithmetic number, because the mean of its divisors is an integer number (25816609).

Almost surely, 2^51633217 is an apocalyptic number.

It is an amenable number.

51633217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51633217 is an equidigital number, since it uses as much as digits as its factorization.

51633217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 51633217 is about 7185.6257208402. The cubic root of 51633217 is about 372.3714662462.

It can be divided in two parts, 516 and 33217, that added together give a palindrome (33733).

The spelling of 51633217 in words is "fifty-one million, six hundred thirty-three thousand, two hundred seventeen".