213087018 has 16 divisors (see below), whose sum is σ = 430312896. Its totient is φ = 70339200.

The previous prime is 213087013. The next prime is 213087031. The reversal of 213087018 is 810780312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (213087013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171783 + ... + 173018.

It is an arithmetic number, because the mean of its divisors is an integer number (26894556).

Almost surely, 2^213087018 is an apocalyptic number.

213087018 is an abundant number, since it is smaller than the sum of its proper divisors (217225878).

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

213087018 is a wasteful number, since it uses less digits than its factorization.

213087018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344909.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 213087018 is about 14597.5004024662. The cubic root of 213087018 is about 597.2905779142.

The spelling of 213087018 in words is "two hundred thirteen million, eighty-seven thousand, eighteen".