25252275217 has 4 divisors (see below), whose sum is σ = 27194757940. Its totient is φ = 23309792496.

The previous prime is 25252275211. The next prime is 25252275221. The reversal of 25252275217 is 71257225252.

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 4642514496 + 20609760721 = 68136^2 + 143561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25252275217 is a prime.

It is a super-2 number, since 2×25252275217² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25252275217.

It is not an unprimeable number, because it can be changed into a prime (25252275211) 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, 971241342 + ... + 971241367.

It is an arithmetic number, because the mean of its divisors is an integer number (6798689485).

Almost surely, 2^25252275217 is an apocalyptic number.

It is an amenable number.

25252275217 is a deficient number, since it is larger than the sum of its proper divisors (1942482723).

25252275217 is a wasteful number, since it uses less digits than its factorization.

25252275217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942482722.

The product of its digits is 196000, while the sum is 40.

The spelling of 25252275217 in words is "twenty-five billion, two hundred fifty-two million, two hundred seventy-five thousand, two hundred seventeen".