72203061 has 32 divisors (see below), whose sum is σ = 114352128. Its totient is φ = 39654720.

The previous prime is 72203039. The next prime is 72203071. The reversal of 72203061 is 16030227.

It is a happy number.

It is not a de Polignac number, because 72203061 - 2⁶ = 72202997 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72203071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127966 + ... + 128528.

It is an arithmetic number, because the mean of its divisors is an integer number (3573504).

Almost surely, 2^72203061 is an apocalyptic number.

It is an amenable number.

72203061 is a deficient number, since it is larger than the sum of its proper divisors (42149067).

72203061 is a wasteful number, since it uses less digits than its factorization.

72203061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 72203061 is about 8497.2384337501. The cubic root of 72203061 is about 416.4074937217.

Adding to 72203061 its reverse (16030227), we get a palindrome (88233288).

The spelling of 72203061 in words is "seventy-two million, two hundred three thousand, sixty-one".