22155031025 has 6 divisors (see below), whose sum is σ = 27472238502. Its totient is φ = 17724024800.

The previous prime is 22155031021. The next prime is 22155031027. The reversal of 22155031025 is 52013055122.

It can be written as a sum of positive squares in 3 ways, for example, as 7623210721 + 14531820304 = 87311^2 + 120548^2 .

It is not a de Polignac number, because 22155031025 - 2² = 22155031021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22155030985 and 22155031003.

It is not an unprimeable number, because it can be changed into a prime (22155031021) 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 5 ways as a sum of consecutive naturals, for example, 443100596 + ... + 443100645.

It is an arithmetic number, because the mean of its divisors is an integer number (4578706417).

Almost surely, 2^22155031025 is an apocalyptic number.

22155031025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22155031025 is a deficient number, since it is larger than the sum of its proper divisors (5317207477).

22155031025 is an equidigital number, since it uses as much as digits as its factorization.

22155031025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886201251 (or 886201246 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 22155031025 its reverse (52013055122), we get a palindrome (74168086147).

The spelling of 22155031025 in words is "twenty-two billion, one hundred fifty-five million, thirty-one thousand, twenty-five".