213953066 has 4 divisors (see below), whose sum is σ = 320929602. Its totient is φ = 106976532.

The previous prime is 213953029. The next prime is 213953083. The reversal of 213953066 is 660359312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 197993041 + 15960025 = 14071^2 + 3995^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53488265 + ... + 53488268.

Almost surely, 2^213953066 is an apocalyptic number.

213953066 is a deficient number, since it is larger than the sum of its proper divisors (106976536).

213953066 is a wasteful number, since it uses less digits than its factorization.

213953066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106976535.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 213953066 is about 14627.1345792674. The cubic root of 213953066 is about 598.0986720249.

The spelling of 213953066 in words is "two hundred thirteen million, nine hundred fifty-three thousand, sixty-six".