2155000440025 has 12 divisors (see below), whose sum is σ = 2672911164924. Its totient is φ = 1723541888000.

The previous prime is 2155000440013. The next prime is 2155000440101. The reversal of 2155000440025 is 5200440005512.

It can be written as a sum of positive squares in 6 ways, for example, as 163108553689 + 1991891886336 = 403867^2 + 1411344^2 .

It is not a de Polignac number, because 2155000440025 - 2¹⁷ = 2155000308953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2155000439975 and 2155000440002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11365696 + ... + 11553745.

It is an arithmetic number, because the mean of its divisors is an integer number (222742597077).

Almost surely, 2^{2155000440025} is an apocalyptic number.

2155000440025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2155000440025 is a deficient number, since it is larger than the sum of its proper divisors (517910724899).

2155000440025 is a wasteful number, since it uses less digits than its factorization.

2155000440025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22923212 (or 22923207 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 2155000440025 its reverse (5200440005512), we get a palindrome (7355440445537).

The spelling of 2155000440025 in words is "two trillion, one hundred fifty-five billion, four hundred forty thousand, twenty-five".