25531523 has 2 divisors, whose sum is σ = 25531524. Its totient is φ = 25531522.

The previous prime is 25531453. The next prime is 25531549. The reversal of 25531523 is 32513552.

It is an a-pointer prime, because the next prime (25531549) can be obtained adding 25531523 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25531523 - 2¹² = 25527427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25531492 and 25531501.

It is not a weakly prime, because it can be changed into another prime (25531553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765761 + 12765762.

It is an arithmetic number, because the mean of its divisors is an integer number (12765762).

Almost surely, 2^25531523 is an apocalyptic number.

25531523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25531523 is an equidigital number, since it uses as much as digits as its factorization.

25531523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 26.

The square root of 25531523 is about 5052.8727472597. The cubic root of 25531523 is about 294.4595025038.

The spelling of 25531523 in words is "twenty-five million, five hundred thirty-one thousand, five hundred twenty-three".