217307650107442 has 4 divisors (see below), whose sum is σ = 325961475161166. Its totient is φ = 108653825053720.

The previous prime is 217307650107433. The next prime is 217307650107473. The reversal of 217307650107442 is 244701056703712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 150303946542201 + 67003703565241 = 12259851^2 + 8185579^2 .

It is a super-2 number, since 2×217307650107442² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54326912526859 + ... + 54326912526862.

Almost surely, 2^{217307650107442} is an apocalyptic number.

217307650107442 is a deficient number, since it is larger than the sum of its proper divisors (108653825053724).

217307650107442 is a wasteful number, since it uses less digits than its factorization.

217307650107442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108653825053723.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 217307650107442 in words is "two hundred seventeen trillion, three hundred seven billion, six hundred fifty million, one hundred seven thousand, four hundred forty-two".