25106251 has 2 divisors, whose sum is σ = 25106252. Its totient is φ = 25106250.

The previous prime is 25106231. The next prime is 25106269. The reversal of 25106251 is 15260152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25106251 is a prime.

It is not a weakly prime, because it can be changed into another prime (25106231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12553125 + 12553126.

It is an arithmetic number, because the mean of its divisors is an integer number (12553126).

Almost surely, 2^25106251 is an apocalyptic number.

25106251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25106251 is an equidigital number, since it uses as much as digits as its factorization.

25106251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 25106251 is about 5010.6138346514. The cubic root of 25106251 is about 292.8154281028.

It can be divided in two parts, 25 and 106251, that added together give a square (106276 = 326²).

The spelling of 25106251 in words is "twenty-five million, one hundred six thousand, two hundred fifty-one".