213868742 has 4 divisors (see below), whose sum is σ = 320803116. Its totient is φ = 106934370.

The previous prime is 213868741. The next prime is 213868763. The reversal of 213868742 is 247868312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 213868742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213868741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53467184 + ... + 53467187.

It is an arithmetic number, because the mean of its divisors is an integer number (80200779).

Almost surely, 2^213868742 is an apocalyptic number.

213868742 is a deficient number, since it is larger than the sum of its proper divisors (106934374).

213868742 is a wasteful number, since it uses less digits than its factorization.

213868742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106934373.

The product of its digits is 129024, while the sum is 41.

The square root of 213868742 is about 14624.2518441115. The cubic root of 213868742 is about 598.0200867218.

The spelling of 213868742 in words is "two hundred thirteen million, eight hundred sixty-eight thousand, seven hundred forty-two".