221250012525 has 36 divisors (see below), whose sum is σ = 404714935872. Its totient is φ = 115489362720.

The previous prime is 221250012509. The next prime is 221250012527. The reversal of 221250012525 is 525210052122.

It is a happy number.

221250012525 is a `hidden beast` number, since 2 + 2 + 12 + 500 + 125 + 25 = 666.

221250012525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221250012525 - 2⁴ = 221250012509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221250012527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10450419 + ... + 10471568.

It is an arithmetic number, because the mean of its divisors is an integer number (11242081552).

Almost surely, 2^221250012525 is an apocalyptic number.

221250012525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221250012525 is a deficient number, since it is larger than the sum of its proper divisors (183464923347).

221250012525 is a wasteful number, since it uses less digits than its factorization.

221250012525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20922050 (or 20922042 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 221250012525 its reverse (525210052122), we get a palindrome (746460064647).

The spelling of 221250012525 in words is "two hundred twenty-one billion, two hundred fifty million, twelve thousand, five hundred twenty-five".