1123105531 has 8 divisors (see below), whose sum is σ = 1133784720. Its totient is φ = 1112439552.

The previous prime is 1123105513. The next prime is 1123105547. The reversal of 1123105531 is 1355013211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123105531 is a prime.

It is a super-2 number, since 2×1123105531² = 2522732067525583922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123105031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277440 + ... + 281458.

It is an arithmetic number, because the mean of its divisors is an integer number (141723090).

Almost surely, 2^1123105531 is an apocalyptic number.

1123105531 is a deficient number, since it is larger than the sum of its proper divisors (10679189).

1123105531 is a wasteful number, since it uses less digits than its factorization.

1123105531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 1123105531 is about 33512.7666867419. The cubic root of 1123105531 is about 1039.4577828776.

Adding to 1123105531 its reverse (1355013211), we get a palindrome (2478118742).

The spelling of 1123105531 in words is "one billion, one hundred twenty-three million, one hundred five thousand, five hundred thirty-one".