1131553200 has 120 divisors (see below), whose sum is σ = 3702048768. Its totient is φ = 295312640.

The previous prime is 1131553139. The next prime is 1131553211. The reversal of 1131553200 is 23551311.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46369 + ... + 66431.

Almost surely, 2^1131553200 is an apocalyptic number.

1131553200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131553200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851024384).

1131553200 is an abundant number, since it is smaller than the sum of its proper divisors (2570495568).

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

1131553200 is a wasteful number, since it uses less digits than its factorization.

1131553200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20131 (or 20120 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1131553200 is about 33638.5671514112. The cubic root of 1131553200 is about 1042.0574408698.

The spelling of 1131553200 in words is "one billion, one hundred thirty-one million, five hundred fifty-three thousand, two hundred".