31404244142 has 4 divisors (see below), whose sum is σ = 47106366216. Its totient is φ = 15702122070.

The previous prime is 31404244141. The next prime is 31404244169. The reversal of 31404244142 is 24144240413.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404244141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7851061034 + ... + 7851061037.

It is an arithmetic number, because the mean of its divisors is an integer number (11776591554).

Almost surely, 2^31404244142 is an apocalyptic number.

31404244142 is a deficient number, since it is larger than the sum of its proper divisors (15702122074).

31404244142 is a wasteful number, since it uses less digits than its factorization.

31404244142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15702122073.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 31404244142 its reverse (24144240413), we get a palindrome (55548484555).

The spelling of 31404244142 in words is "thirty-one billion, four hundred four million, two hundred forty-four thousand, one hundred forty-two".