217433980730 has 16 divisors (see below), whose sum is σ = 396335358720. Its totient is φ = 85872660432.

The previous prime is 217433980679. The next prime is 217433980733. The reversal of 217433980730 is 37089334712.

It is a happy number.

It is a super-2 number, since 2×217433980730² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (217433980733) 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, 137615654 + ... + 137617233.

It is an arithmetic number, because the mean of its divisors is an integer number (24770959920).

Almost surely, 2^217433980730 is an apocalyptic number.

217433980730 is a deficient number, since it is larger than the sum of its proper divisors (178901377990).

217433980730 is a wasteful number, since it uses less digits than its factorization.

217433980730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275232973.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 217433980730 in words is "two hundred seventeen billion, four hundred thirty-three million, nine hundred eighty thousand, seven hundred thirty".