213428905225 has 12 divisors (see below), whose sum is σ = 278580887440. Its totient is φ = 161756643600.

The previous prime is 213428905213. The next prime is 213428905229. The reversal of 213428905225 is 522509824312.

It is not a de Polignac number, because 213428905225 - 2⁷ = 213428905097 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (213428905229) by changing a digit.

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, 224661531 + ... + 224662480.

Almost surely, 2^213428905225 is an apocalyptic number.

213428905225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213428905225 is a deficient number, since it is larger than the sum of its proper divisors (65151982215).

213428905225 is a wasteful number, since it uses less digits than its factorization.

213428905225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449324040 (or 449324035 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 213428905225 in words is "two hundred thirteen billion, four hundred twenty-eight million, nine hundred five thousand, two hundred twenty-five".