25605145231 has 2 divisors, whose sum is σ = 25605145232. Its totient is φ = 25605145230.

The previous prime is 25605145183. The next prime is 25605145253. The reversal of 25605145231 is 13254150652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25605145231 - 2¹³ = 25605137039 is a prime.

It is a super-2 number, since 2×25605145231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25605145831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12802572615 + 12802572616.

It is an arithmetic number, because the mean of its divisors is an integer number (12802572616).

Almost surely, 2^25605145231 is an apocalyptic number.

25605145231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25605145231 is an equidigital number, since it uses as much as digits as its factorization.

25605145231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 25605145231 its reverse (13254150652), we get a palindrome (38859295883).

The spelling of 25605145231 in words is "twenty-five billion, six hundred five million, one hundred forty-five thousand, two hundred thirty-one".