25213222444 has 24 divisors (see below), whose sum is σ = 46840647168. Its totient is φ = 11834054400.

The previous prime is 25213222429. The next prime is 25213222459. The reversal of 25213222444 is 44422231252.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25213222429) and next prime (25213222459).

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, 458007 + ... + 510094.

It is an arithmetic number, because the mean of its divisors is an integer number (1951693632).

Almost surely, 2^25213222444 is an apocalyptic number.

It is an amenable number.

25213222444 is a deficient number, since it is larger than the sum of its proper divisors (21627424724).

25213222444 is a wasteful number, since it uses less digits than its factorization.

25213222444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968505 (or 968503 counting only the distinct ones).

The product of its digits is 30720, while the sum is 31.

Adding to 25213222444 its reverse (44422231252), we get a palindrome (69635453696).

It can be divided in two parts, 252132 and 22444, that added together give a square (274576 = 524²).

The spelling of 25213222444 in words is "twenty-five billion, two hundred thirteen million, two hundred twenty-two thousand, four hundred forty-four".