25518541 has 2 divisors, whose sum is σ = 25518542. Its totient is φ = 25518540.

The previous prime is 25518533. The next prime is 25518553. The reversal of 25518541 is 14581552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 568516 = 4995^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 25518541 - 2³ = 25518533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25518511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12759270 + 12759271.

It is an arithmetic number, because the mean of its divisors is an integer number (12759271).

Almost surely, 2^25518541 is an apocalyptic number.

It is an amenable number.

25518541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25518541 is an equidigital number, since it uses as much as digits as its factorization.

25518541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8000, while the sum is 31.

The square root of 25518541 is about 5051.5879681542. The cubic root of 25518541 is about 294.4095861533.

The spelling of 25518541 in words is "twenty-five million, five hundred eighteen thousand, five hundred forty-one".