2621166225 has 24 divisors (see below), whose sum is σ = 4337659872. Its totient is φ = 1396665600.

The previous prime is 2621166187. The next prime is 2621166253. The reversal of 2621166225 is 5226611262.

2621166225 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2621166225 - 2⁸ = 2621165969 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68665 + ... + 99785.

It is an arithmetic number, because the mean of its divisors is an integer number (180735828).

Almost surely, 2^2621166225 is an apocalyptic number.

2621166225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2621166225 is a deficient number, since it is larger than the sum of its proper divisors (1716493647).

2621166225 is a wasteful number, since it uses less digits than its factorization.

2621166225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32257 (or 32252 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 2621166225 is about 51197.3263462068. The cubic root of 2621166225 is about 1378.7901994319.

Adding to 2621166225 its reverse (5226611262), we get a palindrome (7847777487).

The spelling of 2621166225 in words is "two billion, six hundred twenty-one million, one hundred sixty-six thousand, two hundred twenty-five".