72213026 has 4 divisors (see below), whose sum is σ = 108319542. Its totient is φ = 36106512.

The previous prime is 72213023. The next prime is 72213041. The reversal of 72213026 is 62031227.

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

It can be written as a sum of positive squares in only one way, i.e., 54982225 + 17230801 = 7415^2 + 4151^2 .

It is a super-2 number, since 2×72213026² = 10429442248153352, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72212992 and 72213010.

It is not an unprimeable number, because it can be changed into a prime (72213023) by changing a digit.

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 as a sum of consecutive naturals, namely, 18053255 + ... + 18053258.

Almost surely, 2^72213026 is an apocalyptic number.

72213026 is a deficient number, since it is larger than the sum of its proper divisors (36106516).

72213026 is a wasteful number, since it uses less digits than its factorization.

72213026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36106515.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 72213026 is about 8497.8247804953. The cubic root of 72213026 is about 416.4266494645.

The spelling of 72213026 in words is "seventy-two million, two hundred thirteen thousand, twenty-six".