1131251648 has 28 divisors (see below), whose sum is σ = 2292595872. Its totient is φ = 553589760.

The previous prime is 1131251647. The next prime is 1131251669. The reversal of 1131251648 is 8461521311.

It is a super-2 number, since 2×1131251648² = 2559460582205431808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131251647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185033 + ... + 191048.

It is an arithmetic number, because the mean of its divisors is an integer number (81878424).

Almost surely, 2^1131251648 is an apocalyptic number.

It is an amenable number.

1131251648 is an abundant number, since it is smaller than the sum of its proper divisors (1161344224).

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

1131251648 is an equidigital number, since it uses as much as digits as its factorization.

1131251648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376140 (or 376130 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 1131251648 is about 33634.0846166504. The cubic root of 1131251648 is about 1041.9648653363.

Adding to 1131251648 its reverse (8461521311), we get a palindrome (9592772959).

The spelling of 1131251648 in words is "one billion, one hundred thirty-one million, two hundred fifty-one thousand, six hundred forty-eight".