31444401242 has 8 divisors (see below), whose sum is σ = 48793036500. Its totient is φ = 15180055744.

The previous prime is 31444401239. The next prime is 31444401251. The reversal of 31444401242 is 24210444413.

It can be written as a sum of positive squares in 2 ways, for example, as 27553012081 + 3891389161 = 165991^2 + 62381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31444401242² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271072367 + ... + 271072482.

Almost surely, 2^31444401242 is an apocalyptic number.

31444401242 is a deficient number, since it is larger than the sum of its proper divisors (17348635258).

31444401242 is a wasteful number, since it uses less digits than its factorization.

31444401242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542144880.

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

Adding to 31444401242 its reverse (24210444413), we get a palindrome (55654845655).

The spelling of 31444401242 in words is "thirty-one billion, four hundred forty-four million, four hundred one thousand, two hundred forty-two".