217251454342 has 8 divisors (see below), whose sum is σ = 350944657056. Its totient is φ = 100269901992.

The previous prime is 217251454333. The next prime is 217251454367. The reversal of 217251454342 is 243454152712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×217251454342² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217251454295 and 217251454304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4177912558 + ... + 4177912609.

It is an arithmetic number, because the mean of its divisors is an integer number (43868082132).

Almost surely, 2^217251454342 is an apocalyptic number.

217251454342 is a deficient number, since it is larger than the sum of its proper divisors (133693202714).

217251454342 is a wasteful number, since it uses less digits than its factorization.

217251454342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8355825182.

The product of its digits is 268800, while the sum is 40.

The spelling of 217251454342 in words is "two hundred seventeen billion, two hundred fifty-one million, four hundred fifty-four thousand, three hundred forty-two".