1131231150 has 240 divisors, whose sum is σ = 3646902000. Its totient is φ = 257826240.

The previous prime is 1131231121. The next prime is 1131231151. The reversal of 1131231150 is 511321311.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131231151) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3241176 + ... + 3241524.

It is an arithmetic number, because the mean of its divisors is an integer number (15195425).

Almost surely, 2^1131231150 is an apocalyptic number.

1131231150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131231150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1823451000).

1131231150 is an abundant number, since it is smaller than the sum of its proper divisors (2515670850).

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

1131231150 is an equidigital number, since it uses as much as digits as its factorization.

1131231150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1131231150 is about 33633.7798946238. The cubic root of 1131231150 is about 1041.9585719165.

Adding to 1131231150 its reverse (511321311), we get a palindrome (1642552461).

The spelling of 1131231150 in words is "one billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred fifty".