31143422133 has 48 divisors (see below), whose sum is σ = 48391062720. Its totient is φ = 20001147264.

The previous prime is 31143422117. The next prime is 31143422137. The reversal of 31143422133 is 33122434113.

It is a happy number.

31143422133 is a `hidden beast` number, since 3 + 1 + 1 + 434 + 221 + 3 + 3 = 666.

It is not a de Polignac number, because 31143422133 - 2⁴ = 31143422117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31143422097 and 31143422106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143422137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 742363 + ... + 783191.

It is an arithmetic number, because the mean of its divisors is an integer number (1008147140).

Almost surely, 2^31143422133 is an apocalyptic number.

It is an amenable number.

31143422133 is a deficient number, since it is larger than the sum of its proper divisors (17247640587).

31143422133 is an equidigital number, since it uses as much as digits as its factorization.

31143422133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40960 (or 40948 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 31143422133 its reverse (33122434113), we get a palindrome (64265856246).

The spelling of 31143422133 in words is "thirty-one billion, one hundred forty-three million, four hundred twenty-two thousand, one hundred thirty-three".