31442240105 has 8 divisors (see below), whose sum is σ = 38650949064. Its totient is φ = 24540284800.

The previous prime is 31442240059. The next prime is 31442240113. The reversal of 31442240105 is 50104224413.

It can be written as a sum of positive squares in 4 ways, for example, as 774174976 + 30668065129 = 27824^2 + 175123^2 .

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

It is not a de Polignac number, because 31442240105 - 2⁸ = 31442239849 is a prime.

It is a super-2 number, since 2×31442240105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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, 76688186 + ... + 76688595.

It is an arithmetic number, because the mean of its divisors is an integer number (4831368633).

Almost surely, 2^31442240105 is an apocalyptic number.

It is an amenable number.

31442240105 is a deficient number, since it is larger than the sum of its proper divisors (7208708959).

31442240105 is a wasteful number, since it uses less digits than its factorization.

31442240105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153376827.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 31442240105 its reverse (50104224413), we get a palindrome (81546464518).

The spelling of 31442240105 in words is "thirty-one billion, four hundred forty-two million, two hundred forty thousand, one hundred five".