25140311321 has 2 divisors, whose sum is σ = 25140311322. Its totient is φ = 25140311320.

The previous prime is 25140311291. The next prime is 25140311359. The reversal of 25140311321 is 12311304152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25096896400 + 43414921 = 158420^2 + 6589^2 .

It is a cyclic number.

It is not a de Polignac number, because 25140311321 - 2⁶ = 25140311257 is a prime.

It is not a weakly prime, because it can be changed into another prime (25140314321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12570155660 + 12570155661.

It is an arithmetic number, because the mean of its divisors is an integer number (12570155661).

Almost surely, 2^25140311321 is an apocalyptic number.

It is an amenable number.

25140311321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25140311321 is an equidigital number, since it uses as much as digits as its factorization.

25140311321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 25140311321 its reverse (12311304152), we get a palindrome (37451615473).

The spelling of 25140311321 in words is "twenty-five billion, one hundred forty million, three hundred eleven thousand, three hundred twenty-one".