213040985 has 8 divisors (see below), whose sum is σ = 256554240. Its totient is φ = 169829424.

The previous prime is 213040981. The next prime is 213040999. The reversal of 213040985 is 589040312.

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 213040985 - 2² = 213040981 is a prime.

It is a super-2 number, since 2×213040985² = 90772922579540450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213040981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73865 + ... + 76694.

It is an arithmetic number, because the mean of its divisors is an integer number (32069280).

Almost surely, 2^213040985 is an apocalyptic number.

It is an amenable number.

213040985 is a deficient number, since it is larger than the sum of its proper divisors (43513255).

213040985 is a wasteful number, since it uses less digits than its factorization.

213040985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150847.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 213040985 is about 14595.9235747520. The cubic root of 213040985 is about 597.2475640982.

The spelling of 213040985 in words is "two hundred thirteen million, forty thousand, nine hundred eighty-five".