981971552 has 48 divisors (see below), whose sum is σ = 2004004800. Its totient is φ = 473088000.

The previous prime is 981971539. The next prime is 981971563. The reversal of 981971552 is 255179189.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 981971497 and 981971506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696224 + ... + 697632.

It is an arithmetic number, because the mean of its divisors is an integer number (41750100).

Almost surely, 2^981971552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981971552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002002400).

981971552 is an abundant number, since it is smaller than the sum of its proper divisors (1022033248).

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

981971552 is a wasteful number, since it uses less digits than its factorization.

981971552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199 (or 2191 counting only the distinct ones).

The product of its digits is 226800, while the sum is 47.

The square root of 981971552 is about 31336.4253226178. The cubic root of 981971552 is about 993.9540373362.

The spelling of 981971552 in words is "nine hundred eighty-one million, nine hundred seventy-one thousand, five hundred fifty-two".