51617453 has 2 divisors, whose sum is σ = 51617454. Its totient is φ = 51617452.

The previous prime is 51617443. The next prime is 51617521. The reversal of 51617453 is 35471615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39100009 + 12517444 = 6253^2 + 3538^2 .

It is a cyclic number.

It is not a de Polignac number, because 51617453 - 2⁴ = 51617437 is a prime.

It is a super-2 number, since 2×51617453² = 5328722908414418, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51617443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808726 + 25808727.

It is an arithmetic number, because the mean of its divisors is an integer number (25808727).

Almost surely, 2^51617453 is an apocalyptic number.

It is an amenable number.

51617453 is a deficient number, since it is larger than the sum of its proper divisors (1).

51617453 is an equidigital number, since it uses as much as digits as its factorization.

51617453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 32.

The square root of 51617453 is about 7184.5287249756. The cubic root of 51617453 is about 372.3335664753. Note that the first 3 decimals are identical.

The spelling of 51617453 in words is "fifty-one million, six hundred seventeen thousand, four hundred fifty-three".