25031230321 has 4 divisors (see below), whose sum is σ = 26503655652. Its totient is φ = 23558804992.

The previous prime is 25031230313. The next prime is 25031230373. The reversal of 25031230321 is 12303213052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7737665296 + 17293565025 = 87964^2 + 131505^2 .

It is a cyclic number.

It is not a de Polignac number, because 25031230321 - 2³ = 25031230313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25031230292 and 25031230301.

It is not an unprimeable number, because it can be changed into a prime (25031234321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736212640 + ... + 736212673.

It is an arithmetic number, because the mean of its divisors is an integer number (6625913913).

Almost surely, 2^25031230321 is an apocalyptic number.

It is an amenable number.

25031230321 is a deficient number, since it is larger than the sum of its proper divisors (1472425331).

25031230321 is a wasteful number, since it uses less digits than its factorization.

25031230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472425330.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 25031230321 its reverse (12303213052), we get a palindrome (37334443373).

The spelling of 25031230321 in words is "twenty-five billion, thirty-one million, two hundred thirty thousand, three hundred twenty-one".