25465553 has 2 divisors, whose sum is σ = 25465554. Its totient is φ = 25465552.

The previous prime is 25465549. The next prime is 25465579. The reversal of 25465553 is 35556452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24720784 + 744769 = 4972^2 + 863^2 .

It is a cyclic number.

It is not a de Polignac number, because 25465553 - 2² = 25465549 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25465513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12732776 + 12732777.

It is an arithmetic number, because the mean of its divisors is an integer number (12732777).

Almost surely, 2^25465553 is an apocalyptic number.

It is an amenable number.

25465553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25465553 is an equidigital number, since it uses as much as digits as its factorization.

25465553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90000, while the sum is 35.

The square root of 25465553 is about 5046.3405552935. The cubic root of 25465553 is about 294.2056692537.

The spelling of 25465553 in words is "twenty-five million, four hundred sixty-five thousand, five hundred fifty-three".