215693397830 has 16 divisors (see below), whose sum is σ = 388674310464. Its totient is φ = 86182649280.

The previous prime is 215693397823. The next prime is 215693397847. The reversal of 215693397830 is 38793396512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11829167 + ... + 11847386.

It is an arithmetic number, because the mean of its divisors is an integer number (24292144404).

Almost surely, 2^215693397830 is an apocalyptic number.

215693397830 is a deficient number, since it is larger than the sum of its proper divisors (172980912634).

215693397830 is a wasteful number, since it uses less digits than its factorization.

215693397830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23677471.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 215693397830 in words is "two hundred fifteen billion, six hundred ninety-three million, three hundred ninety-seven thousand, eight hundred thirty".