31135242005 has 8 divisors (see below), whose sum is σ = 42699760512. Its totient is φ = 21349880208.

The previous prime is 31135241971. The next prime is 31135242011. The reversal of 31135242005 is 50024253113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31135242005 - 2²⁰ = 31134193429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 444789137 + ... + 444789206.

It is an arithmetic number, because the mean of its divisors is an integer number (5337470064).

Almost surely, 2^31135242005 is an apocalyptic number.

31135242005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31135242005 is a deficient number, since it is larger than the sum of its proper divisors (11564518507).

31135242005 is an equidigital number, since it uses as much as digits as its factorization.

31135242005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889578355.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 31135242005 its reverse (50024253113), we get a palindrome (81159495118).

The spelling of 31135242005 in words is "thirty-one billion, one hundred thirty-five million, two hundred forty-two thousand, five".