999981552 has 60 divisors (see below), whose sum is σ = 2726451240. Its totient is φ = 315778176.

The previous prime is 999981551. The next prime is 999981607. The reversal of 999981552 is 255189999.

999981552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 999981492 and 999981501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999981551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11527 + ... + 46182.

It is an arithmetic number, because the mean of its divisors is an integer number (45440854).

Almost surely, 2^999981552 is an apocalyptic number.

It is an amenable number.

999981552 is an abundant number, since it is smaller than the sum of its proper divisors (1726469688).

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

999981552 is a wasteful number, since it uses less digits than its factorization.

999981552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57758 (or 57733 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 57.

The square root of 999981552 is about 31622.4849118471. The cubic root of 999981552 is about 999.9938506289.

The spelling of 999981552 in words is "nine hundred ninety-nine million, nine hundred eighty-one thousand, five hundred fifty-two".