1123215256 has 16 divisors (see below), whose sum is σ = 2108168640. Its totient is φ = 561036960.

The previous prime is 1123215251. The next prime is 1123215263. The reversal of 1123215256 is 6525123211.

It is a super-2 number, since 2×1123215256² = 2523225022622291072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123215251) 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, 62911 + ... + 78766.

It is an arithmetic number, because the mean of its divisors is an integer number (131760540).

Almost surely, 2^1123215256 is an apocalyptic number.

It is an amenable number.

1123215256 is a deficient number, since it is larger than the sum of its proper divisors (984953384).

1123215256 is a wasteful number, since it uses less digits than its factorization.

1123215256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142674 (or 142670 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 1123215256 is about 33514.4037094501. The cubic root of 1123215256 is about 1039.4916327068.

Adding to 1123215256 its reverse (6525123211), we get a palindrome (7648338467).

The spelling of 1123215256 in words is "one billion, one hundred twenty-three million, two hundred fifteen thousand, two hundred fifty-six".