1131831528 has 32 divisors (see below), whose sum is σ = 2850240960. Its totient is φ = 374522240.

The previous prime is 1131831521. The next prime is 1131831529. The reversal of 1131831528 is 8251381311.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1131831521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168828 + ... + 175403.

It is an arithmetic number, because the mean of its divisors is an integer number (89070030).

Almost surely, 2^1131831528 is an apocalyptic number.

It is an amenable number.

1131831528 is an abundant number, since it is smaller than the sum of its proper divisors (1718409432).

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

1131831528 is a wasteful number, since it uses less digits than its factorization.

1131831528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344377 (or 344373 counting only the distinct ones).

The product of its digits is 5760, while the sum is 33.

The square root of 1131831528 is about 33642.7039341370. The cubic root of 1131831528 is about 1042.1428721121.

The spelling of 1131831528 in words is "one billion, one hundred thirty-one million, eight hundred thirty-one thousand, five hundred twenty-eight".