72055213 has 8 divisors (see below), whose sum is σ = 73915160. Its totient is φ = 70217280.

The previous prime is 72055211. The next prime is 72055219. The reversal of 72055213 is 31255027.

It can be written as a sum of positive squares in 4 ways, for example, as 110889 + 71944324 = 333^2 + 8482^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72055213 - 2¹ = 72055211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72055211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231 + ... + 12067.

It is an arithmetic number, because the mean of its divisors is an integer number (9239395).

Almost surely, 2^72055213 is an apocalyptic number.

It is an amenable number.

72055213 is a deficient number, since it is larger than the sum of its proper divisors (1859947).

72055213 is a wasteful number, since it uses less digits than its factorization.

72055213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11007.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 72055213 is about 8488.5342079773. The cubic root of 72055213 is about 416.1230778731.

The spelling of 72055213 in words is "seventy-two million, fifty-five thousand, two hundred thirteen".