213603953 has 4 divisors (see below), whose sum is σ = 213634548. Its totient is φ = 213573360.

The previous prime is 213603917. The next prime is 213603959. The reversal of 213603953 is 359306312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19642624 + 193961329 = 4432^2 + 13927^2 .

It is a cyclic number.

It is not a de Polignac number, because 213603953 - 2⁸ = 213603697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213603959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875 + ... + 20687.

It is an arithmetic number, because the mean of its divisors is an integer number (53408637).

Almost surely, 2^213603953 is an apocalyptic number.

It is an amenable number.

213603953 is a deficient number, since it is larger than the sum of its proper divisors (30595).

213603953 is a wasteful number, since it uses less digits than its factorization.

213603953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30594.

The product of its (nonzero) digits is 14580, while the sum is 32.

The square root of 213603953 is about 14615.1959617379. The cubic root of 213603953 is about 597.7731836689.

The spelling of 213603953 in words is "two hundred thirteen million, six hundred three thousand, nine hundred fifty-three".