31400143142 has 4 divisors (see below), whose sum is σ = 47100214716. Its totient is φ = 15700071570.

The previous prime is 31400143057. The next prime is 31400143157. The reversal of 31400143142 is 24134100413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24134100413 = 8609 ⋅2803357.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7850035784 + ... + 7850035787.

It is an arithmetic number, because the mean of its divisors is an integer number (11775053679).

Almost surely, 2^31400143142 is an apocalyptic number.

31400143142 is a deficient number, since it is larger than the sum of its proper divisors (15700071574).

31400143142 is a wasteful number, since it uses less digits than its factorization.

31400143142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15700071573.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31400143142 its reverse (24134100413), we get a palindrome (55534243555).

The spelling of 31400143142 in words is "thirty-one billion, four hundred million, one hundred forty-three thousand, one hundred forty-two".