72218042 has 16 divisors (see below), whose sum is σ = 117583872. Its totient is φ = 33067440.

The previous prime is 72218039. The next prime is 72218077. The reversal of 72218042 is 24081227.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7634 + ... + 14237.

It is an arithmetic number, because the mean of its divisors is an integer number (7348992).

Almost surely, 2^72218042 is an apocalyptic number.

72218042 is a deficient number, since it is larger than the sum of its proper divisors (45365830).

72218042 is a wasteful number, since it uses less digits than its factorization.

72218042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22013.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 72218042 is about 8498.1199097212. The cubic root of 72218042 is about 416.4362910663.

Adding to 72218042 its reverse (24081227), we get a palindrome (96299269).

The spelling of 72218042 in words is "seventy-two million, two hundred eighteen thousand, forty-two".