213945403 has 8 divisors (see below), whose sum is σ = 245790720. Its totient is φ = 182420520.

The previous prime is 213945397. The next prime is 213945419. The reversal of 213945403 is 304549312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213945403 - 2⁹ = 213944891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213945443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78673 + ... + 81346.

It is an arithmetic number, because the mean of its divisors is an integer number (30723840).

Almost surely, 2^213945403 is an apocalyptic number.

213945403 is a deficient number, since it is larger than the sum of its proper divisors (31845317).

213945403 is a wasteful number, since it uses less digits than its factorization.

213945403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160217.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 213945403 is about 14626.8726322478. The cubic root of 213945403 is about 598.0915313858.

The spelling of 213945403 in words is "two hundred thirteen million, nine hundred forty-five thousand, four hundred three".