25117951 has 2 divisors, whose sum is σ = 25117952. Its totient is φ = 25117950.

The previous prime is 25117927. The next prime is 25117957. The reversal of 25117951 is 15971152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25117951 - 2¹³ = 25109759 is a prime.

It is a super-2 number, since 2×25117951² = 1261822924876802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25117957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12558975 + 12558976.

It is an arithmetic number, because the mean of its divisors is an integer number (12558976).

Almost surely, 2^25117951 is an apocalyptic number.

25117951 is a deficient number, since it is larger than the sum of its proper divisors (1).

25117951 is an equidigital number, since it uses as much as digits as its factorization.

25117951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 31.

The square root of 25117951 is about 5011.7812202849. The cubic root of 25117951 is about 292.8609069288.

The spelling of 25117951 in words is "twenty-five million, one hundred seventeen thousand, nine hundred fifty-one".