25011551 has 2 divisors, whose sum is σ = 25011552. Its totient is φ = 25011550.

The previous prime is 25011527. The next prime is 25011559. The reversal of 25011551 is 15511052.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25011551 - 2⁶ = 25011487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25011559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12505775 + 12505776.

It is an arithmetic number, because the mean of its divisors is an integer number (12505776).

Almost surely, 2^25011551 is an apocalyptic number.

25011551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25011551 is an equidigital number, since it uses as much as digits as its factorization.

25011551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 25011551 is about 5001.1549666052. The cubic root of 25011551 is about 292.4468006591.

The spelling of 25011551 in words is "twenty-five million, eleven thousand, five hundred fifty-one".