25540651 has 2 divisors, whose sum is σ = 25540652. Its totient is φ = 25540650.

The previous prime is 25540607. The next prime is 25540657. The reversal of 25540651 is 15604552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25540651 - 2⁷ = 25540523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25540657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770325 + 12770326.

It is an arithmetic number, because the mean of its divisors is an integer number (12770326).

Almost surely, 2^25540651 is an apocalyptic number.

25540651 is a deficient number, since it is larger than the sum of its proper divisors (1).

25540651 is an equidigital number, since it uses as much as digits as its factorization.

25540651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 25540651 is about 5053.7759150956. The cubic root of 25540651 is about 294.4945899274.

The spelling of 25540651 in words is "twenty-five million, five hundred forty thousand, six hundred fifty-one".