11223436731 has 16 divisors (see below), whose sum is σ = 16167540480. Its totient is φ = 6884514720.

The previous prime is 11223436729. The next prime is 11223436811. The reversal of 11223436731 is 13763432211.

It is a happy number.

It is not a de Polignac number, because 11223436731 - 2¹ = 11223436729 is a prime.

It is a super-2 number, since 2×11223436731² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11223436692 and 11223436701.

It is not an unprimeable number, because it can be changed into a prime (11223436031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450541 + ... + 474798.

It is an arithmetic number, because the mean of its divisors is an integer number (1010471280).

Almost surely, 2^11223436731 is an apocalyptic number.

11223436731 is a deficient number, since it is larger than the sum of its proper divisors (4944103749).

11223436731 is a wasteful number, since it uses less digits than its factorization.

11223436731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925666.

The product of its digits is 18144, while the sum is 33.

Adding to 11223436731 its reverse (13763432211), we get a palindrome (24986868942).

The spelling of 11223436731 in words is "eleven billion, two hundred twenty-three million, four hundred thirty-six thousand, seven hundred thirty-one".