217006090 has 16 divisors (see below), whose sum is σ = 446412672. Its totient is φ = 74402064.

The previous prime is 217006067. The next prime is 217006091. The reversal of 217006090 is 90600712.

It is not an unprimeable number, because it can be changed into a prime (217006091) 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, 1549974 + ... + 1550113.

It is an arithmetic number, because the mean of its divisors is an integer number (27900792).

Almost surely, 2^217006090 is an apocalyptic number.

217006090 is an abundant number, since it is smaller than the sum of its proper divisors (229406582).

217006090 is a wasteful number, since it uses less digits than its factorization.

217006090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100101.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 217006090 is about 14731.1265692750. The cubic root of 217006090 is about 600.9301221909.

The spelling of 217006090 in words is "two hundred seventeen million, six thousand, ninety".