1123537216 has 56 divisors (see below), whose sum is σ = 2316740096. Its totient is φ = 540034560.

The previous prime is 1123537201. The next prime is 1123537237. The reversal of 1123537216 is 6127353211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309685 + ... + 313291.

Almost surely, 2^1123537216 is an apocalyptic number.

1123537216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123537216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158370048).

1123537216 is an abundant number, since it is smaller than the sum of its proper divisors (1193202880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123537216 is a wasteful number, since it uses less digits than its factorization.

1123537216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807 (or 3797 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 1123537216 is about 33519.2066731896. The cubic root of 1123537216 is about 1039.5909436662.

The spelling of 1123537216 in words is "one billion, one hundred twenty-three million, five hundred thirty-seven thousand, two hundred sixteen".