72213122 has 16 divisors (see below), whose sum is σ = 111592320. Its totient is φ = 35021808.

The previous prime is 72213107. The next prime is 72213131. The reversal of 72213122 is 22131227.

It is a junction number, because it is equal to n+sod(n) for n = 72213094 and 72213103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25829 + ... + 28487.

It is an arithmetic number, because the mean of its divisors is an integer number (6974520).

Almost surely, 2^72213122 is an apocalyptic number.

72213122 is a deficient number, since it is larger than the sum of its proper divisors (39379198).

72213122 is a wasteful number, since it uses less digits than its factorization.

72213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065.

The product of its digits is 336, while the sum is 20.

The square root of 72213122 is about 8497.8304289977. The cubic root of 72213122 is about 416.4268339970.

Adding to 72213122 its reverse (22131227), we get a palindrome (94344349).

It can be divided in two parts, 722 and 13122, that multiplied together give a square (9474084 = 3078²).

The spelling of 72213122 in words is "seventy-two million, two hundred thirteen thousand, one hundred twenty-two".