217730142374 has 4 divisors (see below), whose sum is σ = 326595213564. Its totient is φ = 108865071186.

The previous prime is 217730142373. The next prime is 217730142407. The reversal of 217730142374 is 473241037712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217730142373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54432535592 + ... + 54432535595.

It is an arithmetic number, because the mean of its divisors is an integer number (81648803391).

Almost surely, 2^217730142374 is an apocalyptic number.

217730142374 is a deficient number, since it is larger than the sum of its proper divisors (108865071190).

217730142374 is a wasteful number, since it uses less digits than its factorization.

217730142374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108865071189.

The product of its (nonzero) digits is 197568, while the sum is 41.

The spelling of 217730142374 in words is "two hundred seventeen billion, seven hundred thirty million, one hundred forty-two thousand, three hundred seventy-four".