72243003 has 16 divisors (see below), whose sum is σ = 112332800. Its totient is φ = 41281128.

The previous prime is 72242993. The next prime is 72243011. The reversal of 72243003 is 30034227.

It is a happy number.

It is not a de Polignac number, because 72243003 - 2⁶ = 72242939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72243043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34075 + ... + 36132.

It is an arithmetic number, because the mean of its divisors is an integer number (7020800).

Almost surely, 2^72243003 is an apocalyptic number.

72243003 is a deficient number, since it is larger than the sum of its proper divisors (40089797).

72243003 is an equidigital number, since it uses as much as digits as its factorization.

72243003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70231 (or 70217 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 72243003 is about 8499.5884017992. The cubic root of 72243003 is about 416.4842636994.

The spelling of 72243003 in words is "seventy-two million, two hundred forty-three thousand, three".