72403028131 has 6 divisors (see below), whose sum is σ = 84223930740. Its totient is φ = 62059738356.

The previous prime is 72403028111. The next prime is 72403028153. The reversal of 72403028131 is 13182030427.

It is not a de Polignac number, because 72403028131 - 2⁵ = 72403028099 is a prime.

It is a super-2 number, since 2×72403028131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72403028093 and 72403028102.

It is not an unprimeable number, because it can be changed into a prime (72403028111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 738806361 + ... + 738806458.

It is an arithmetic number, because the mean of its divisors is an integer number (14037321790).

Almost surely, 2^72403028131 is an apocalyptic number.

72403028131 is a deficient number, since it is larger than the sum of its proper divisors (11820902609).

72403028131 is a wasteful number, since it uses less digits than its factorization.

72403028131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477612833 (or 1477612826 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 72403028131 its reverse (13182030427), we get a palindrome (85585058558).

The spelling of 72403028131 in words is "seventy-two billion, four hundred three million, twenty-eight thousand, one hundred thirty-one".