213616506 has 32 divisors (see below), whose sum is σ = 450596160. Its totient is φ = 67326336.

The previous prime is 213616499. The next prime is 213616511. The reversal of 213616506 is 605616312.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 68820 + ... + 71856.

It is an arithmetic number, because the mean of its divisors is an integer number (14081130).

Almost surely, 2^213616506 is an apocalyptic number.

213616506 is an abundant number, since it is smaller than the sum of its proper divisors (236979654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213616506 is a wasteful number, since it uses less digits than its factorization.

213616506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 213616506 is about 14615.6254057088. The cubic root of 213616506 is about 597.7848933457.

The spelling of 213616506 in words is "two hundred thirteen million, six hundred sixteen thousand, five hundred six".