51823553 has 2 divisors, whose sum is σ = 51823554. Its totient is φ = 51823552.

The previous prime is 51823483. The next prime is 51823561. The reversal of 51823553 is 35532815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41628304 + 10195249 = 6452^2 + 3193^2 .

It is a cyclic number.

It is not a de Polignac number, because 51823553 - 2¹² = 51819457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (51823573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25911776 + 25911777.

It is an arithmetic number, because the mean of its divisors is an integer number (25911777).

Almost surely, 2^51823553 is an apocalyptic number.

It is an amenable number.

51823553 is a deficient number, since it is larger than the sum of its proper divisors (1).

51823553 is an equidigital number, since it uses as much as digits as its factorization.

51823553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 32.

The square root of 51823553 is about 7198.8577566167. The cubic root of 51823553 is about 372.8284639409.

The spelling of 51823553 in words is "fifty-one million, eight hundred twenty-three thousand, five hundred fifty-three".