531121892 has 48 divisors (see below), whose sum is σ = 1109324160. Its totient is φ = 217684992.

The previous prime is 531121891. The next prime is 531121901. The reversal of 531121892 is 298121135.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (531121891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83828 + ... + 89940.

It is an arithmetic number, because the mean of its divisors is an integer number (23110920).

Almost surely, 2^531121892 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 531121892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554662080).

531121892 is an abundant number, since it is smaller than the sum of its proper divisors (578202268).

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

531121892 is a wasteful number, since it uses less digits than its factorization.

531121892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260 (or 6258 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 531121892 is about 23046.0819229647. The cubic root of 531121892 is about 809.8378438797.

The spelling of 531121892 in words is "five hundred thirty-one million, one hundred twenty-one thousand, eight hundred ninety-two".