31244420042 has 32 divisors (see below), whose sum is σ = 51858169920. Its totient is φ = 13999201920.

The previous prime is 31244420023. The next prime is 31244420047. The reversal of 31244420042 is 24002444213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31244419993 and 31244420020.

It is not an unprimeable number, because it can be changed into a prime (31244420047) 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, 3318113 + ... + 3327515.

It is an arithmetic number, because the mean of its divisors is an integer number (1620567810).

Almost surely, 2^31244420042 is an apocalyptic number.

31244420042 is a deficient number, since it is larger than the sum of its proper divisors (20613749878).

31244420042 is a wasteful number, since it uses less digits than its factorization.

31244420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11558.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 31244420042 its reverse (24002444213), we get a palindrome (55246864255).

The spelling of 31244420042 in words is "thirty-one billion, two hundred forty-four million, four hundred twenty thousand, forty-two".