217429740147 has 8 divisors (see below), whose sum is σ = 294819986880. Its totient is φ = 142496326760.

The previous prime is 217429740139. The next prime is 217429740181. The reversal of 217429740147 is 741047924712.

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

It is a cyclic number.

It is not a de Polignac number, because 217429740147 - 2³ = 217429740139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 217429740096 and 217429740105.

It is not an unprimeable number, because it can be changed into a prime (217429740547) 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, 614208129 + ... + 614208482.

It is an arithmetic number, because the mean of its divisors is an integer number (36852498360).

Almost surely, 2^217429740147 is an apocalyptic number.

217429740147 is a deficient number, since it is larger than the sum of its proper divisors (77390246733).

217429740147 is a wasteful number, since it uses less digits than its factorization.

217429740147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228416673.

The product of its (nonzero) digits is 790272, while the sum is 48.

The spelling of 217429740147 in words is "two hundred seventeen billion, four hundred twenty-nine million, seven hundred forty thousand, one hundred forty-seven".