213078506 has 8 divisors (see below), whose sum is σ = 320639844. Its totient is φ = 106198560.

The previous prime is 213078499. The next prime is 213078511. The reversal of 213078506 is 605870312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 184552225 + 28526281 = 13585^2 + 5341^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169565 + ... + 170816.

Almost surely, 2^213078506 is an apocalyptic number.

213078506 is a deficient number, since it is larger than the sum of its proper divisors (107561338).

213078506 is a wasteful number, since it uses less digits than its factorization.

213078506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340696.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 213078506 is about 14597.2088427891. The cubic root of 213078506 is about 597.2826246609.

The spelling of 213078506 in words is "two hundred thirteen million, seventy-eight thousand, five hundred six".