213393505 has 8 divisors (see below), whose sum is σ = 275770152. Its totient is φ = 157582848.

The previous prime is 213393493. The next prime is 213393539. The reversal of 213393505 is 505393312.

It can be written as a sum of positive squares in 4 ways, for example, as 36397089 + 176996416 = 6033^2 + 13304^2 .

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 213393505 - 2⁷ = 213393377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1641424 + ... + 1641553.

It is an arithmetic number, because the mean of its divisors is an integer number (34471269).

Almost surely, 2^213393505 is an apocalyptic number.

It is an amenable number.

213393505 is a deficient number, since it is larger than the sum of its proper divisors (62376647).

213393505 is a wasteful number, since it uses less digits than its factorization.

213393505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282995.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 213393505 is about 14607.9945577755. The cubic root of 213393505 is about 597.5768054252.

The spelling of 213393505 in words is "two hundred thirteen million, three hundred ninety-three thousand, five hundred five".