25551623 has 2 divisors, whose sum is σ = 25551624. Its totient is φ = 25551622.

The previous prime is 25551613. The next prime is 25551649. The reversal of 25551623 is 32615552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25551623 - 2⁴ = 25551607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25551613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775811 + 12775812.

It is an arithmetic number, because the mean of its divisors is an integer number (12775812).

Almost surely, 2^25551623 is an apocalyptic number.

25551623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551623 is an equidigital number, since it uses as much as digits as its factorization.

25551623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 29.

The square root of 25551623 is about 5054.8613235182. The cubic root of 25551623 is about 294.5367545020.

The spelling of 25551623 in words is "twenty-five million, five hundred fifty-one thousand, six hundred twenty-three".