31143422 has 16 divisors (see below), whose sum is σ = 50518080. Its totient is φ = 14343168.

The previous prime is 31143407. The next prime is 31143433. The reversal of 31143422 is 22434113.

It is a junction number, because it is equal to n+sod(n) for n = 31143394 and 31143403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8147 + ... + 11342.

It is an arithmetic number, because the mean of its divisors is an integer number (3157380).

Almost surely, 2^31143422 is an apocalyptic number.

31143422 is a deficient number, since it is larger than the sum of its proper divisors (19374658).

31143422 is a wasteful number, since it uses less digits than its factorization.

31143422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19555.

The product of its digits is 576, while the sum is 20.

The square root of 31143422 is about 5580.6291759980. The cubic root of 31143422 is about 314.6217749825.

Adding to 31143422 its reverse (22434113), we get a palindrome (53577535).

The spelling of 31143422 in words is "thirty-one million, one hundred forty-three thousand, four hundred twenty-two".