25157543 has 2 divisors, whose sum is σ = 25157544. Its totient is φ = 25157542.

The previous prime is 25157453. The next prime is 25157567. The reversal of 25157543 is 34575152.

Together with previous prime (25157453) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25157543 - 2¹⁰ = 25156519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25157443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12578771 + 12578772.

It is an arithmetic number, because the mean of its divisors is an integer number (12578772).

Almost surely, 2^25157543 is an apocalyptic number.

25157543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25157543 is an equidigital number, since it uses as much as digits as its factorization.

25157543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 32.

The square root of 25157543 is about 5015.7295581002. The cubic root of 25157543 is about 293.0146994920.

The spelling of 25157543 in words is "twenty-five million, one hundred fifty-seven thousand, five hundred forty-three".