72203040031 has 2 divisors, whose sum is σ = 72203040032. Its totient is φ = 72203040030.

The previous prime is 72203039983. The next prime is 72203040043. The reversal of 72203040031 is 13004030227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72203040031 - 2¹⁷ = 72202908959 is a prime.

It is a super-2 number, since 2×72203040031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72203039984 and 72203040011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72203040061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36101520015 + 36101520016.

It is an arithmetic number, because the mean of its divisors is an integer number (36101520016).

Almost surely, 2^72203040031 is an apocalyptic number.

72203040031 is a deficient number, since it is larger than the sum of its proper divisors (1).

72203040031 is an equidigital number, since it uses as much as digits as its factorization.

72203040031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

Adding to 72203040031 its reverse (13004030227), we get a palindrome (85207070258).

The spelling of 72203040031 in words is "seventy-two billion, two hundred three million, forty thousand, thirty-one".