1131554550 has 72 divisors (see below), whose sum is σ = 3264440616. Its totient is φ = 258639360.

The previous prime is 1131554539. The next prime is 1131554579. The reversal of 1131554550 is 554551311.

1131554550 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69627 + ... + 84326.

It is an arithmetic number, because the mean of its divisors is an integer number (45339453).

Almost surely, 2^1131554550 is an apocalyptic number.

1131554550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131554550 is an abundant number, since it is smaller than the sum of its proper divisors (2132886066).

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

1131554550 is a wasteful number, since it uses less digits than its factorization.

1131554550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153982 (or 153970 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 1131554550 is about 33638.5872176582. The cubic root of 1131554550 is about 1042.0578552787.

The spelling of 1131554550 in words is "one billion, one hundred thirty-one million, five hundred fifty-four thousand, five hundred fifty".