72211603 has 4 divisors (see below), whose sum is σ = 72492840. Its totient is φ = 71930368.

The previous prime is 72211589. The next prime is 72211621. The reversal of 72211603 is 30611227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30611227 = 43 ⋅711889.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72211603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72211003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140233 + ... + 140746.

It is an arithmetic number, because the mean of its divisors is an integer number (18123210).

Almost surely, 2^72211603 is an apocalyptic number.

72211603 is a deficient number, since it is larger than the sum of its proper divisors (281237).

72211603 is a wasteful number, since it uses less digits than its factorization.

72211603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281236.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 72211603 is about 8497.7410527740. The cubic root of 72211603 is about 416.4239141361.

The spelling of 72211603 in words is "seventy-two million, two hundred eleven thousand, six hundred three".