1123216455 has 32 divisors (see below), whose sum is σ = 1822487040. Its totient is φ = 590652800.

The previous prime is 1123216433. The next prime is 1123216489. The reversal of 1123216455 is 5546123211.

It is not a de Polignac number, because 1123216455 - 2¹³ = 1123208263 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 397036 + ... + 399854.

It is an arithmetic number, because the mean of its divisors is an integer number (56952720).

Almost surely, 2^1123216455 is an apocalyptic number.

1123216455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1123216455 is a deficient number, since it is larger than the sum of its proper divisors (699270585).

1123216455 is a wasteful number, since it uses less digits than its factorization.

1123216455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191.

The product of its digits is 7200, while the sum is 30.

The square root of 1123216455 is about 33514.4215972766. The cubic root of 1123216455 is about 1039.4920025825.

Adding to 1123216455 its reverse (5546123211), we get a palindrome (6669339666).

The spelling of 1123216455 in words is "one billion, one hundred twenty-three million, two hundred sixteen thousand, four hundred fifty-five".