111472513538 has 4 divisors (see below), whose sum is σ = 167208770310. Its totient is φ = 55736256768.

The previous prime is 111472513511. The next prime is 111472513549. The reversal of 111472513538 is 835315274111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835315274111 = 41 ⋅20373543271.

It can be written as a sum of positive squares in only one way, i.e., 80606591569 + 30865921969 = 283913^2 + 175687^2 .

It is a super-2 number, since 2×111472513538² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111472513495 and 111472513504.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27868128383 + ... + 27868128386.

Almost surely, 2^111472513538 is an apocalyptic number.

111472513538 is a deficient number, since it is larger than the sum of its proper divisors (55736256772).

111472513538 is an equidigital number, since it uses as much as digits as its factorization.

111472513538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55736256771.

The product of its digits is 100800, while the sum is 41.

Adding to 111472513538 its reverse (835315274111), we get a palindrome (946787787649).

The spelling of 111472513538 in words is "one hundred eleven billion, four hundred seventy-two million, five hundred thirteen thousand, five hundred thirty-eight".