11221534431 has 24 divisors (see below), whose sum is σ = 16592576000. Its totient is φ = 7304075856.

The previous prime is 11221534417. The next prime is 11221534447. The reversal of 11221534431 is 13443512211.

11221534431 is a `hidden beast` number, since 1 + 1 + 2 + 215 + 3 + 443 + 1 = 666.

It is not a de Polignac number, because 11221534431 - 2²¹ = 11219437279 is a prime.

It is a super-2 number, since 2×11221534431² (a number of 21 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 = 11221534395 and 11221534404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221534031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1349970 + ... + 1358256.

Almost surely, 2^11221534431 is an apocalyptic number.

11221534431 is a deficient number, since it is larger than the sum of its proper divisors (5371041569).

11221534431 is a wasteful number, since it uses less digits than its factorization.

11221534431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11835 (or 11832 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The spelling of 11221534431 in words is "eleven billion, two hundred twenty-one million, five hundred thirty-four thousand, four hundred thirty-one".