320111142 has 32 divisors (see below), whose sum is σ = 692371680. Its totient is φ = 98081280.

The previous prime is 320111123. The next prime is 320111147. The reversal of 320111142 is 241111023.

It is a super-2 number, since 2×320111142² = 204942286465088328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320111147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10284 + ... + 27312.

It is an arithmetic number, because the mean of its divisors is an integer number (21636615).

Almost surely, 2^320111142 is an apocalyptic number.

320111142 is an abundant number, since it is smaller than the sum of its proper divisors (372260538).

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

320111142 is a wasteful number, since it uses less digits than its factorization.

320111142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17288.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 320111142 is about 17891.6500636470. The cubic root of 320111142 is about 684.0695570658.

Adding to 320111142 its reverse (241111023), we get a palindrome (561222165).

It can be divided in two parts, 32011 and 1142, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 320111142 in words is "three hundred twenty million, one hundred eleven thousand, one hundred forty-two".