1131445321550 has 96 divisors (see below), whose sum is σ = 2333568802752. Its totient is φ = 405963233280.

The previous prime is 1131445321547. The next prime is 1131445321577. The reversal of 1131445321550 is 551235441311.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131445321550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5310884 + ... + 5519816.

It is an arithmetic number, because the mean of its divisors is an integer number (24308008362).

Almost surely, 2^{1131445321550} is an apocalyptic number.

1131445321550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131445321550 is an abundant number, since it is smaller than the sum of its proper divisors (1202123481202).

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

1131445321550 is a wasteful number, since it uses less digits than its factorization.

1131445321550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209262 (or 209257 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 1131445321550 in words is "one trillion, one hundred thirty-one billion, four hundred forty-five million, three hundred twenty-one thousand, five hundred fifty".