72224647533 has 12 divisors (see below), whose sum is σ = 104332418268. Its totient is φ = 48146106240.

The previous prime is 72224647531. The next prime is 72224647567. The reversal of 72224647533 is 33574642227.

72224647533 is a `hidden beast` number, since 72 + 2 + 2 + 4 + 6 + 47 + 533 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38729059209 + 33495588324 = 196797^2 + 183018^2 .

It is not a de Polignac number, because 72224647533 - 2¹ = 72224647531 is a prime.

It is a super-2 number, since 2×72224647533² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72224647531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177058 + ... + 419283.

It is an arithmetic number, because the mean of its divisors is an integer number (8694368189).

Almost surely, 2^72224647533 is an apocalyptic number.

It is an amenable number.

72224647533 is a deficient number, since it is larger than the sum of its proper divisors (32107770735).

72224647533 is a wasteful number, since it uses less digits than its factorization.

72224647533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609804 (or 609801 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 45.

The spelling of 72224647533 in words is "seventy-two billion, two hundred twenty-four million, six hundred forty-seven thousand, five hundred thirty-three".