2563553 has 2 divisors, whose sum is σ = 2563554. Its totient is φ = 2563552.

The previous prime is 2563543. The next prime is 2563601. The reversal of 2563553 is 3553652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1456849 + 1106704 = 1207^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563553 - 2⁶ = 2563489 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2 + 5³ + 6 + 3⁶ + 5⁷ + 5⁹ + 3¹² .

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2563523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281776 + 1281777.

It is an arithmetic number, because the mean of its divisors is an integer number (1281777).

2^2563553 is an apocalyptic number.

It is an amenable number.

2563553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563553 is an equidigital number, since it uses as much as digits as its factorization.

2563553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 29.

The square root of 2563553 is about 1601.1099275190. The cubic root of 2563553 is about 136.8613334005.

Subtracting 2563553 from its reverse (3553652), we obtain a palindrome (990099).

The spelling of 2563553 in words is "two million, five hundred sixty-three thousand, five hundred fifty-three".