25223551 has 2 divisors, whose sum is σ = 25223552. Its totient is φ = 25223550.

The previous prime is 25223509. The next prime is 25223593. The reversal of 25223551 is 15532252.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (25223509) and next prime (25223593).

It is a cyclic number.

It is not a de Polignac number, because 25223551 - 2⁹ = 25223039 is a prime.

It is equal to p_1579003 and since 25223551 and 1579003 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25223501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12611775 + 12611776.

It is an arithmetic number, because the mean of its divisors is an integer number (12611776).

Almost surely, 2^25223551 is an apocalyptic number.

25223551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25223551 is an equidigital number, since it uses as much as digits as its factorization.

25223551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 25.

The square root of 25223551 is about 5022.3053471489. The cubic root of 25223551 is about 293.2707449397.

The spelling of 25223551 in words is "twenty-five million, two hundred twenty-three thousand, five hundred fifty-one".