1115522123 has 4 divisors (see below), whose sum is σ = 1116648768. Its totient is φ = 1114395480.

The previous prime is 1115522119. The next prime is 1115522143. The reversal of 1115522123 is 3212255111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1115522123 - 2² = 1115522119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115522113) 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, 561836 + ... + 563817.

It is an arithmetic number, because the mean of its divisors is an integer number (279162192).

Almost surely, 2^1115522123 is an apocalyptic number.

1115522123 is a deficient number, since it is larger than the sum of its proper divisors (1126645).

1115522123 is an equidigital number, since it uses as much as digits as its factorization.

1115522123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126644.

The product of its digits is 600, while the sum is 23.

The square root of 1115522123 is about 33399.4329742288. The cubic root of 1115522123 is about 1037.1129628683.

Adding to 1115522123 its reverse (3212255111), we get a palindrome (4327777234).

The spelling of 1115522123 in words is "one billion, one hundred fifteen million, five hundred twenty-two thousand, one hundred twenty-three".