25152100221013 has 4 divisors (see below), whose sum is σ = 25578407004480. Its totient is φ = 24725793437548.

The previous prime is 25152100220963. The next prime is 25152100221043. The reversal of 25152100221013 is 31012200125152.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25152100221013 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 (25152100221043) 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, 213153391645 + ... + 213153391762.

It is an arithmetic number, because the mean of its divisors is an integer number (6394601751120).

Almost surely, 2^{25152100221013} is an apocalyptic number.

It is an amenable number.

25152100221013 is a deficient number, since it is larger than the sum of its proper divisors (426306783467).

25152100221013 is an equidigital number, since it uses as much as digits as its factorization.

25152100221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426306783466.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 25152100221013 its reverse (31012200125152), we get a palindrome (56164300346165).

The spelling of 25152100221013 in words is "twenty-five trillion, one hundred fifty-two billion, one hundred million, two hundred twenty-one thousand, thirteen".