1131554000 has 160 divisors (see below), whose sum is σ = 3025092096. Its totient is φ = 407193600.

The previous prime is 1131553991. The next prime is 1131554009. The reversal of 1131554000 is 4551311.

It is an interprime number because it is at equal distance from previous prime (1131553991) and next prime (1131554009).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131554009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 781277 + ... + 782723.

Almost surely, 2^1131554000 is an apocalyptic number.

1131554000 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 1131554000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512546048).

1131554000 is an abundant number, since it is smaller than the sum of its proper divisors (1893538096).

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

1131554000 is a wasteful number, since it uses less digits than its factorization.

1131554000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1131554000 is about 33638.5790425220. The cubic root of 1131554000 is about 1042.0576864455.

The spelling of 1131554000 in words is "one billion, one hundred thirty-one million, five hundred fifty-four thousand".