221453011025 has 12 divisors (see below), whose sum is σ = 284070759900. Its totient is φ = 171053359680.

The previous prime is 221453010997. The next prime is 221453011049. The reversal of 221453011025 is 520110354122.

It can be written as a sum of positive squares in 6 ways, for example, as 7016407696 + 214436603329 = 83764^2 + 463073^2 .

It is not a de Polignac number, because 221453011025 - 2⁸ = 221453010769 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221453010985 and 221453011003.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 152725490 + ... + 152726939.

It is an arithmetic number, because the mean of its divisors is an integer number (23672563325).

Almost surely, 2^221453011025 is an apocalyptic number.

221453011025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221453011025 is a deficient number, since it is larger than the sum of its proper divisors (62617748875).

221453011025 is a wasteful number, since it uses less digits than its factorization.

221453011025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305452468 (or 305452463 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 221453011025 its reverse (520110354122), we get a palindrome (741563365147).

The spelling of 221453011025 in words is "two hundred twenty-one billion, four hundred fifty-three million, eleven thousand, twenty-five".