213173402 has 16 divisors (see below), whose sum is σ = 345039912. Its totient is φ = 98192640.

The previous prime is 213173357. The next prime is 213173459. The reversal of 213173402 is 204371312.

It can be written as a sum of positive squares in 4 ways, for example, as 171583801 + 41589601 = 13099^2 + 6449^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5678 + ... + 21414.

Almost surely, 2^213173402 is an apocalyptic number.

213173402 is a deficient number, since it is larger than the sum of its proper divisors (131866510).

213173402 is a wasteful number, since it uses less digits than its factorization.

213173402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16273.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 213173402 is about 14600.4589653887. The cubic root of 213173402 is about 597.3712794965.

The spelling of 213173402 in words is "two hundred thirteen million, one hundred seventy-three thousand, four hundred two".