981133550 has 24 divisors (see below), whose sum is σ = 1825938936. Its totient is φ = 392231840.

The previous prime is 981133541. The next prime is 981133553. The reversal of 981133550 is 55331189.

It is a super-3 number, since 3×981133550³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 981133550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981133553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106217 + ... + 115083.

It is an arithmetic number, because the mean of its divisors is an integer number (76080789).

Almost surely, 2^981133550 is an apocalyptic number.

981133550 is a deficient number, since it is larger than the sum of its proper divisors (844805386).

981133550 is a wasteful number, since it uses less digits than its factorization.

981133550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092 (or 11087 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 981133550 is about 31323.0514158503. The cubic root of 981133550 is about 993.6712143017.

The spelling of 981133550 in words is "nine hundred eighty-one million, one hundred thirty-three thousand, five hundred fifty".