1131231054 has 16 divisors (see below), whose sum is σ = 2263293648. Its totient is φ = 376938432.

The previous prime is 1131231053. The next prime is 1131231091. The reversal of 1131231054 is 4501321311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131231054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131231053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16207 + ... + 50250.

It is an arithmetic number, because the mean of its divisors is an integer number (141455853).

Almost surely, 2^1131231054 is an apocalyptic number.

1131231054 is an abundant number, since it is smaller than the sum of its proper divisors (1132062594).

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

1131231054 is a wasteful number, since it uses less digits than its factorization.

1131231054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69299.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1131231054 is about 33633.7784674871. The cubic root of 1131231054 is about 1041.9585424418.

Adding to 1131231054 its reverse (4501321311), we get a palindrome (5632552365).

The spelling of 1131231054 in words is "one billion, one hundred thirty-one million, two hundred thirty-one thousand, fifty-four".