31133123142 has 16 divisors (see below), whose sum is σ = 67926814272. Its totient is φ = 9434279720.

The previous prime is 31133123141. The next prime is 31133123171. The reversal of 31133123142 is 24132133113.

It is a super-3 number, since 3×31133123142³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31133123141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235856928 + ... + 235857059.

It is an arithmetic number, because the mean of its divisors is an integer number (4245425892).

Almost surely, 2^31133123142 is an apocalyptic number.

31133123142 is an abundant number, since it is smaller than the sum of its proper divisors (36793691130).

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

31133123142 is a wasteful number, since it uses less digits than its factorization.

31133123142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471714003.

The product of its digits is 1296, while the sum is 24.

Adding to 31133123142 its reverse (24132133113), we get a palindrome (55265256255).

The spelling of 31133123142 in words is "thirty-one billion, one hundred thirty-three million, one hundred twenty-three thousand, one hundred forty-two".