25251623 has 2 divisors, whose sum is σ = 25251624. Its totient is φ = 25251622.

The previous prime is 25251617. The next prime is 25251661. The reversal of 25251623 is 32615252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25251623 - 2⁴ = 25251607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25251592 and 25251601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25251673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12625811 + 12625812.

It is an arithmetic number, because the mean of its divisors is an integer number (12625812).

Almost surely, 2^25251623 is an apocalyptic number.

25251623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25251623 is an equidigital number, since it uses as much as digits as its factorization.

25251623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 25251623 is about 5025.0993025014. The cubic root of 25251623 is about 293.3795010265.

Adding to 25251623 its reverse (32615252), we get a palindrome (57866875).

The spelling of 25251623 in words is "twenty-five million, two hundred fifty-one thousand, six hundred twenty-three".