25340223215 has 4 divisors (see below), whose sum is σ = 30408267864. Its totient is φ = 20272178568.

The previous prime is 25340223211. The next prime is 25340223217. The reversal of 25340223215 is 51232204352.

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 25340223215 - 2² = 25340223211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25340223211) 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, 2534022317 + ... + 2534022326.

It is an arithmetic number, because the mean of its divisors is an integer number (7602066966).

Almost surely, 2^25340223215 is an apocalyptic number.

25340223215 is a deficient number, since it is larger than the sum of its proper divisors (5068044649).

25340223215 is an equidigital number, since it uses as much as digits as its factorization.

25340223215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068044648.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 25340223215 its reverse (51232204352), we get a palindrome (76572427567).

The spelling of 25340223215 in words is "twenty-five billion, three hundred forty million, two hundred twenty-three thousand, two hundred fifteen".