213902343225 has 36 divisors (see below), whose sum is σ = 383212237356. Its totient is φ = 114054637440.

The previous prime is 213902343223. The next prime is 213902343247. The reversal of 213902343225 is 522343209312.

213902343225 is a `hidden beast` number, since 2 + 1 + 3 + 90 + 2 + 343 + 225 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 17237589264 + 196664753961 = 131292^2 + 443469^2 .

It is not a de Polignac number, because 213902343225 - 2¹ = 213902343223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213902343225.

It is not an unprimeable number, because it can be changed into a prime (213902343223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 875227 + ... + 1092623.

It is an arithmetic number, because the mean of its divisors is an integer number (10644784371).

Almost surely, 2^213902343225 is an apocalyptic number.

213902343225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213902343225 is a deficient number, since it is larger than the sum of its proper divisors (169309894131).

213902343225 is a wasteful number, since it uses less digits than its factorization.

213902343225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221786 (or 221778 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 213902343225 in words is "two hundred thirteen billion, nine hundred two million, three hundred forty-three thousand, two hundred twenty-five".