1103133431 has 4 divisors (see below), whose sum is σ = 1103904672. Its totient is φ = 1102362192.

The previous prime is 1103133403. The next prime is 1103133439. The reversal of 1103133431 is 1343313011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1343313011 = 1321 ⋅1016891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1103133431 is a prime.

It is a super-4 number, since 4×1103133431⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103133439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383471 + ... + 386336.

It is an arithmetic number, because the mean of its divisors is an integer number (275976168).

Almost surely, 2^1103133431 is an apocalyptic number.

1103133431 is a deficient number, since it is larger than the sum of its proper divisors (771241).

1103133431 is an equidigital number, since it uses as much as digits as its factorization.

1103133431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771240.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1103133431 is about 33213.4525606719. The cubic root of 1103133431 is about 1033.2593615333.

Adding to 1103133431 its reverse (1343313011), we get a palindrome (2446446442).

The spelling of 1103133431 in words is "one billion, one hundred three million, one hundred thirty-three thousand, four hundred thirty-one".