72553333 has 4 divisors (see below), whose sum is σ = 72636940. Its totient is φ = 72469728.

The previous prime is 72553309. The next prime is 72553373. The reversal of 72553333 is 33335527.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46267204 + 26286129 = 6802^2 + 5127^2 .

It is a cyclic number.

It is not a de Polignac number, because 72553333 - 2¹³ = 72545141 is a prime.

It is a super-2 number, since 2×72553333² = 10527972258817778, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72553295 and 72553304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72553373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40488 + ... + 42241.

It is an arithmetic number, because the mean of its divisors is an integer number (18159235).

Almost surely, 2^72553333 is an apocalyptic number.

It is an amenable number.

72553333 is a deficient number, since it is larger than the sum of its proper divisors (83607).

72553333 is an equidigital number, since it uses as much as digits as its factorization.

72553333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83606.

The product of its digits is 28350, while the sum is 31.

The square root of 72553333 is about 8517.8244288081. The cubic root of 72553333 is about 417.0797674370.

The spelling of 72553333 in words is "seventy-two million, five hundred fifty-three thousand, three hundred thirty-three".