25013213331 has 4 divisors (see below), whose sum is σ = 33350951112. Its totient is φ = 16675475552.

The previous prime is 25013213327. The next prime is 25013213353. The reversal of 25013213331 is 13331231052.

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

It is a cyclic number.

It is not a de Polignac number, because 25013213331 - 2² = 25013213327 is a prime.

It is a super-2 number, since 2×25013213331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25013213311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4168868886 + ... + 4168868891.

It is an arithmetic number, because the mean of its divisors is an integer number (8337737778).

Almost surely, 2^25013213331 is an apocalyptic number.

25013213331 is a deficient number, since it is larger than the sum of its proper divisors (8337737781).

25013213331 is an equidigital number, since it uses as much as digits as its factorization.

25013213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8337737780.

The product of its (nonzero) digits is 1620, while the sum is 24.

Adding to 25013213331 its reverse (13331231052), we get a palindrome (38344444383).

The spelling of 25013213331 in words is "twenty-five billion, thirteen million, two hundred thirteen thousand, three hundred thirty-one".