1331444142 has 56 divisors (see below), whose sum is σ = 3422174256. Its totient is φ = 380409696.

The previous prime is 1331444137. The next prime is 1331444159. The reversal of 1331444142 is 2414441331.

It is a super-2 number, since 2×1331444142² = 3545487006532232328, which contains 22 as substring.

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 polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 55023 + ... + 75434.

Almost surely, 2^1331444142 is an apocalyptic number.

1331444142 is an abundant number, since it is smaller than the sum of its proper divisors (2090730114).

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

1331444142 is an equidigital number, since it uses as much as digits as its factorization.

1331444142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130484 (or 130469 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 1331444142 is about 36488.9591794559. The cubic root of 1331444142 is about 1100.1223395612.

Adding to 1331444142 its reverse (2414441331), we get a palindrome (3745885473).

The spelling of 1331444142 in words is "one billion, three hundred thirty-one million, four hundred forty-four thousand, one hundred forty-two".