811550112 has 48 divisors (see below), whose sum is σ = 2152305792. Its totient is φ = 267724800.

The previous prime is 811550111. The next prime is 811550143. The reversal of 811550112 is 211055118.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×811550112² = 1317227168574425088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (811550111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34264 + ... + 52887.

It is an arithmetic number, because the mean of its divisors is an integer number (44839704).

Almost surely, 2^811550112 is an apocalyptic number.

It is an amenable number.

811550112 is an abundant number, since it is smaller than the sum of its proper divisors (1340755680).

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

811550112 is a wasteful number, since it uses less digits than its factorization.

811550112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87261 (or 87253 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 24.

The square root of 811550112 is about 28487.7186169760. The cubic root of 811550112 is about 932.7640097052.

The spelling of 811550112 in words is "eight hundred eleven million, five hundred fifty thousand, one hundred twelve".