25213510443245 has 8 divisors (see below), whose sum is σ = 30256247133816. Its totient is φ = 20170785286656.

The previous prime is 25213510443217. The next prime is 25213510443257. The reversal of 25213510443245 is 54234401531252.

It can be written as a sum of positive squares in 4 ways, for example, as 377699972329 + 24835810470916 = 614573^2 + 4983554^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25213510443245 - 2¹⁰ = 25213510442221 is a prime.

It is a super-2 number, since 2×25213510443245² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3027209 + ... + 7719521.

It is an arithmetic number, because the mean of its divisors is an integer number (3782030891727).

Almost surely, 2^{25213510443245} is an apocalyptic number.

It is an amenable number.

25213510443245 is a deficient number, since it is larger than the sum of its proper divisors (5042736690571).

25213510443245 is a wasteful number, since it uses less digits than its factorization.

25213510443245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5766991.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 25213510443245 its reverse (54234401531252), we get a palindrome (79447911974497).

The spelling of 25213510443245 in words is "twenty-five trillion, two hundred thirteen billion, five hundred ten million, four hundred forty-three thousand, two hundred forty-five".