31431012143 has 16 divisors (see below), whose sum is σ = 33297868800. Its totient is φ = 29585790720.

The previous prime is 31431012131. The next prime is 31431012149. The reversal of 31431012143 is 34121013413.

It is not a de Polignac number, because 31431012143 - 2⁶ = 31431012079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431012149) 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, 3366680 + ... + 3376002.

It is an arithmetic number, because the mean of its divisors is an integer number (2081116800).

Almost surely, 2^31431012143 is an apocalyptic number.

31431012143 is a deficient number, since it is larger than the sum of its proper divisors (1866856657).

31431012143 is a wasteful number, since it uses less digits than its factorization.

31431012143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10462.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31431012143 its reverse (34121013413), we get a palindrome (65552025556).

The spelling of 31431012143 in words is "thirty-one billion, four hundred thirty-one million, twelve thousand, one hundred forty-three".