31132323442 has 32 divisors (see below), whose sum is σ = 52258639104. Its totient is φ = 13786780800.

The previous prime is 31132323427. The next prime is 31132323449. The reversal of 31132323442 is 24432323113.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31132323442.

It is not an unprimeable number, because it can be changed into a prime (31132323449) 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, 637623 + ... + 684709.

It is an arithmetic number, because the mean of its divisors is an integer number (1633082472).

Almost surely, 2^31132323442 is an apocalyptic number.

31132323442 is a deficient number, since it is larger than the sum of its proper divisors (21126315662).

31132323442 is a wasteful number, since it uses less digits than its factorization.

31132323442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47874.

The product of its digits is 10368, while the sum is 28.

Adding to 31132323442 its reverse (24432323113), we get a palindrome (55564646555).

The spelling of 31132323442 in words is "thirty-one billion, one hundred thirty-two million, three hundred twenty-three thousand, four hundred forty-two".