25005553 has 2 divisors, whose sum is σ = 25005554. Its totient is φ = 25005552.

The previous prime is 25005527. The next prime is 25005583. The reversal of 25005553 is 35550052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24532209 + 473344 = 4953^2 + 688^2 .

It is a cyclic number.

It is not a de Polignac number, because 25005553 - 2⁹ = 25005041 is a prime.

It is not a weakly prime, because it can be changed into another prime (25005583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12502776 + 12502777.

It is an arithmetic number, because the mean of its divisors is an integer number (12502777).

Almost surely, 2^25005553 is an apocalyptic number.

It is an amenable number.

25005553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25005553 is an equidigital number, since it uses as much as digits as its factorization.

25005553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 25005553 is about 5000.5552691676. Note that the first 3 decimals coincide. The cubic root of 25005553 is about 292.4234216459.

The spelling of 25005553 in words is "twenty-five million, five thousand, five hundred fifty-three".