216280742 has 4 divisors (see below), whose sum is σ = 324421116. Its totient is φ = 108140370.

The previous prime is 216280733. The next prime is 216280747. The reversal of 216280742 is 247082612.

216280742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 216280699 and 216280708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216280747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54070184 + ... + 54070187.

It is an arithmetic number, because the mean of its divisors is an integer number (81105279).

Almost surely, 2^216280742 is an apocalyptic number.

216280742 is a deficient number, since it is larger than the sum of its proper divisors (108140374).

216280742 is a wasteful number, since it uses less digits than its factorization.

216280742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108140373.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 216280742 is about 14706.4863920652. The cubic root of 216280742 is about 600.2598337574.

The spelling of 216280742 in words is "two hundred sixteen million, two hundred eighty thousand, seven hundred forty-two".