25166503 has 2 divisors, whose sum is σ = 25166504. Its totient is φ = 25166502.

The previous prime is 25166459. The next prime is 25166527. The reversal of 25166503 is 30566152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25166503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25166593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12583251 + 12583252.

It is an arithmetic number, because the mean of its divisors is an integer number (12583252).

Almost surely, 2^25166503 is an apocalyptic number.

25166503 is a deficient number, since it is larger than the sum of its proper divisors (1).

25166503 is an equidigital number, since it uses as much as digits as its factorization.

25166503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 25166503 is about 5016.6226686886. The cubic root of 25166503 is about 293.0494816391.

It can be divided in two parts, 2 and 5166503, that added together give a triangular number (5166505 = T₃₂₁₄).

The spelling of 25166503 in words is "twenty-five million, one hundred sixty-six thousand, five hundred three".