25052210440 has 16 divisors (see below), whose sum is σ = 56367473580. Its totient is φ = 10020884160.

The previous prime is 25052210431. The next prime is 25052210549. The reversal of 25052210440 is 4401225052.

It can be written as a sum of positive squares in 2 ways, for example, as 25051925284 + 285156 = 158278^2 + 534^2 .

It is a super-2 number, since 2×25052210440² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313152591 + ... + 313152670.

Almost surely, 2^25052210440 is an apocalyptic number.

25052210440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25052210440 is an abundant number, since it is smaller than the sum of its proper divisors (31315263140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25052210440 is a wasteful number, since it uses less digits than its factorization.

25052210440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626305272 (or 626305268 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 25052210440 its reverse (4401225052), we get a palindrome (29453435492).

The spelling of 25052210440 in words is "twenty-five billion, fifty-two million, two hundred ten thousand, four hundred forty".