217396280924 has 12 divisors (see below), whose sum is σ = 380475355848. Its totient is φ = 108689036400.

The previous prime is 217396280921. The next prime is 217396280951. The reversal of 217396280924 is 429082693712.

It is a super-2 number, since 2×217396280924² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217396280921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2222147 + ... + 2317914.

It is an arithmetic number, because the mean of its divisors is an integer number (31706279654).

Almost surely, 2^217396280924 is an apocalyptic number.

It is an amenable number.

217396280924 is a deficient number, since it is larger than the sum of its proper divisors (163079074924).

217396280924 is a wasteful number, since it uses less digits than its factorization.

217396280924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552036 (or 4552034 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 217396280924 in words is "two hundred seventeen billion, three hundred ninety-six million, two hundred eighty thousand, nine hundred twenty-four".