217366142 has 8 divisors (see below), whose sum is σ = 372627696. Its totient is φ = 93156912.

The previous prime is 217366129. The next prime is 217366147. The reversal of 217366142 is 241663712.

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

It is a junction number, because it is equal to n+sod(n) for n = 217366099 and 217366108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217366147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7763063 + ... + 7763090.

It is an arithmetic number, because the mean of its divisors is an integer number (46578462).

Almost surely, 2^217366142 is an apocalyptic number.

217366142 is a deficient number, since it is larger than the sum of its proper divisors (155261554).

217366142 is a wasteful number, since it uses less digits than its factorization.

217366142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15526162.

The product of its digits is 12096, while the sum is 32.

The square root of 217366142 is about 14743.3422940662. The cubic root of 217366142 is about 601.2622888122.

The spelling of 217366142 in words is "two hundred seventeen million, three hundred sixty-six thousand, one hundred forty-two".