25567951 has 2 divisors, whose sum is σ = 25567952. Its totient is φ = 25567950.

The previous prime is 25567903. The next prime is 25567961. The reversal of 25567951 is 15976552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25567951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25567961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12783975 + 12783976.

It is an arithmetic number, because the mean of its divisors is an integer number (12783976).

Almost surely, 2^25567951 is an apocalyptic number.

25567951 is a deficient number, since it is larger than the sum of its proper divisors (1).

25567951 is an equidigital number, since it uses as much as digits as its factorization.

25567951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 40.

The square root of 25567951 is about 5056.4761445101. The cubic root of 25567951 is about 294.5994794425.

The spelling of 25567951 in words is "twenty-five million, five hundred sixty-seven thousand, nine hundred fifty-one".