1143381550 has 36 divisors (see below), whose sum is σ = 2202633576. Its totient is φ = 441565600.

The previous prime is 1143381479. The next prime is 1143381611. The reversal of 1143381550 is 551833411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28455 + ... + 55645.

It is an arithmetic number, because the mean of its divisors is an integer number (61184266).

Almost surely, 2^1143381550 is an apocalyptic number.

1143381550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1143381550 is a deficient number, since it is larger than the sum of its proper divisors (1059252026).

1143381550 is a wasteful number, since it uses less digits than its factorization.

1143381550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27261 (or 27227 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1143381550 is about 33813.9253858525. The cubic root of 1143381550 is about 1045.6758065342.

The spelling of 1143381550 in words is "one billion, one hundred forty-three million, three hundred eighty-one thousand, five hundred fifty".