1213800275 has 24 divisors (see below), whose sum is σ = 1653227520. Its totient is φ = 879927840.

The previous prime is 1213800251. The next prime is 1213800277. The reversal of 1213800275 is 5720083121.

It is not a de Polignac number, because 1213800275 - 2¹² = 1213796179 is a prime.

It is a super-2 number, since 2×1213800275² = 2946622215180151250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213800277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44627 + ... + 66476.

It is an arithmetic number, because the mean of its divisors is an integer number (68884480).

Almost surely, 2^1213800275 is an apocalyptic number.

1213800275 is a deficient number, since it is larger than the sum of its proper divisors (439427245).

1213800275 is a wasteful number, since it uses less digits than its factorization.

1213800275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111155 (or 111150 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1213800275 is about 34839.6365509171. The cubic root of 1213800275 is about 1066.7166580845.

Adding to 1213800275 its reverse (5720083121), we get a palindrome (6933883396).

The spelling of 1213800275 in words is "one billion, two hundred thirteen million, eight hundred thousand, two hundred seventy-five".