25245222211 has 16 divisors (see below), whose sum is σ = 29514348288. Its totient is φ = 21359052000.

The previous prime is 25245222203. The next prime is 25245222251. The reversal of 25245222211 is 11222254252.

It is not a de Polignac number, because 25245222211 - 2³ = 25245222203 is a prime.

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 25245222211.

It is not an unprimeable number, because it can be changed into a prime (25245222251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339065 + ... + 1357786.

It is an arithmetic number, because the mean of its divisors is an integer number (1844646768).

Almost surely, 2^25245222211 is an apocalyptic number.

25245222211 is a deficient number, since it is larger than the sum of its proper divisors (4269126077).

25245222211 is a wasteful number, since it uses less digits than its factorization.

25245222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696922.

The product of its digits is 6400, while the sum is 28.

Adding to 25245222211 its reverse (11222254252), we get a palindrome (36467476463).

It can be divided in two parts, 25245 and 222211, that added together give a triangular number (247456 = T₇₀₃).

The spelling of 25245222211 in words is "twenty-five billion, two hundred forty-five million, two hundred twenty-two thousand, two hundred eleven".