1131513984 has 48 divisors (see below), whose sum is σ = 3256052670. Its totient is φ = 377170944.

The previous prime is 1131513947. The next prime is 1131513989. The reversal of 1131513984 is 4893151311.

It is a happy number.

1131513984 is a `hidden beast` number, since 1 + 131 + 513 + 9 + 8 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 638673984 + 492840000 = 25272^2 + 22200^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1131513989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 489957 + ... + 492260.

Almost surely, 2^1131513984 is an apocalyptic number.

It is an amenable number.

1131513984 is an abundant number, since it is smaller than the sum of its proper divisors (2124538686).

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

1131513984 is an equidigital number, since it uses as much as digits as its factorization.

1131513984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982237 (or 982222 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1131513984 is about 33637.9842440061. The cubic root of 1131513984 is about 1042.0454026093.

The spelling of 1131513984 in words is "one billion, one hundred thirty-one million, five hundred thirteen thousand, nine hundred eighty-four".