211225530525 has 48 divisors (see below), whose sum is σ = 350112174720. Its totient is φ = 112368211200.

The previous prime is 211225530497. The next prime is 211225530541. The reversal of 211225530525 is 525035522112.

It is a de Polignac number, because none of the positive numbers 2^k-211225530525 is a prime.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 91478071 + ... + 91480379.

It is an arithmetic number, because the mean of its divisors is an integer number (7294003640).

Almost surely, 2^211225530525 is an apocalyptic number.

211225530525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211225530525 is a deficient number, since it is larger than the sum of its proper divisors (138886644195).

211225530525 is a wasteful number, since it uses less digits than its factorization.

211225530525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4886 (or 4881 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 211225530525 in words is "two hundred eleven billion, two hundred twenty-five million, five hundred thirty thousand, five hundred twenty-five".