1131020180 has 12 divisors (see below), whose sum is σ = 2375142420. Its totient is φ = 452408064.

The previous prime is 1131020153. The next prime is 1131020203. The reversal of 1131020180 is 810201311.

It can be written as a sum of positive squares in 2 ways, for example, as 608806276 + 522213904 = 24674^2 + 22852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28275485 + ... + 28275524.

It is an arithmetic number, because the mean of its divisors is an integer number (197928535).

Almost surely, 2^1131020180 is an apocalyptic number.

1131020180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131020180 is an abundant number, since it is smaller than the sum of its proper divisors (1244122240).

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

1131020180 is a wasteful number, since it uses less digits than its factorization.

1131020180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56551018 (or 56551016 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1131020180 is about 33630.6434669335. The cubic root of 1131020180 is about 1041.8937942134.

Adding to 1131020180 its reverse (810201311), we get a palindrome (1941221491).

The spelling of 1131020180 in words is "one billion, one hundred thirty-one million, twenty thousand, one hundred eighty".