31401443142 has 12 divisors (see below), whose sum is σ = 68036460180. Its totient is φ = 10467147708.

The previous prime is 31401443141. The next prime is 31401443167. The reversal of 31401443142 is 24134410413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401443141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 872262292 + ... + 872262327.

It is an arithmetic number, because the mean of its divisors is an integer number (5669705015).

Almost surely, 2^31401443142 is an apocalyptic number.

31401443142 is an abundant number, since it is smaller than the sum of its proper divisors (36635017038).

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

31401443142 is a wasteful number, since it uses less digits than its factorization.

31401443142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744524627 (or 1744524624 counting only the distinct ones).

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

Adding to 31401443142 its reverse (24134410413), we get a palindrome (55535853555).

The spelling of 31401443142 in words is "thirty-one billion, four hundred one million, four hundred forty-three thousand, one hundred forty-two".