203455213 has 12 divisors (see below), whose sum is σ = 227911860. Its totient is φ = 181324416.

The previous prime is 203455207. The next prime is 203455229. The reversal of 203455213 is 312554302.

203455213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 11854249 + 191600964 = 3443^2 + 13842^2 .

It is not a de Polignac number, because 203455213 - 2¹⁷ = 203324141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203455613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15856 + ... + 25657.

It is an arithmetic number, because the mean of its divisors is an integer number (18992655).

Almost surely, 2^203455213 is an apocalyptic number.

It is an amenable number.

203455213 is a deficient number, since it is larger than the sum of its proper divisors (24456647).

203455213 is a wasteful number, since it uses less digits than its factorization.

203455213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41568 (or 41555 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 203455213 is about 14263.7727477691. The cubic root of 203455213 is about 588.1520394857.

The spelling of 203455213 in words is "two hundred three million, four hundred fifty-five thousand, two hundred thirteen".