25172222010 has 128 divisors (see below), whose sum is σ = 68560128000. Its totient is φ = 5863663872.

The previous prime is 25172221993. The next prime is 25172222017. The reversal of 25172222010 is 1022227152.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25172222017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11551101 + ... + 11553279.

It is an arithmetic number, because the mean of its divisors is an integer number (535626000).

Almost surely, 2^25172222010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25172222010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34280064000).

25172222010 is an abundant number, since it is smaller than the sum of its proper divisors (43387905990).

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

25172222010 is a wasteful number, since it uses less digits than its factorization.

25172222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 1120, while the sum is 24.

Adding to 25172222010 its reverse (1022227152), we get a palindrome (26194449162).

The spelling of 25172222010 in words is "twenty-five billion, one hundred seventy-two million, two hundred twenty-two thousand, ten".