1231442055 has 32 divisors (see below), whose sum is σ = 2193163200. Its totient is φ = 655589376.

The previous prime is 1231442027. The next prime is 1231442071. The reversal of 1231442055 is 5502441321.

1231442055 is a `hidden beast` number, since 1 + 231 + 4 + 420 + 5 + 5 = 666.

It is not a de Polignac number, because 1231442055 - 2⁹ = 1231441543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69991 + ... + 85799.

It is an arithmetic number, because the mean of its divisors is an integer number (68536350).

Almost surely, 2^1231442055 is an apocalyptic number.

1231442055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1231442055 is a deficient number, since it is larger than the sum of its proper divisors (961721145).

1231442055 is a wasteful number, since it uses less digits than its factorization.

1231442055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16400 (or 16394 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1231442055 is about 35091.9086827719. The cubic root of 1231442055 is about 1071.8598262804.

Adding to 1231442055 its reverse (5502441321), we get a palindrome (6733883376).

The spelling of 1231442055 in words is "one billion, two hundred thirty-one million, four hundred forty-two thousand, fifty-five".