31142305 has 8 divisors (see below), whose sum is σ = 37665792. Its totient is φ = 24717168.

The previous prime is 31142303. The next prime is 31142381. The reversal of 31142305 is 50324113.

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 31142305 - 2¹ = 31142303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31142303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23887 + ... + 25156.

It is an arithmetic number, because the mean of its divisors is an integer number (4708224).

Almost surely, 2^31142305 is an apocalyptic number.

It is an amenable number.

31142305 is a deficient number, since it is larger than the sum of its proper divisors (6523487).

31142305 is a wasteful number, since it uses less digits than its factorization.

31142305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49175.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31142305 is about 5580.5290967793. The cubic root of 31142305 is about 314.6180134956.

Adding to 31142305 its reverse (50324113), we get a palindrome (81466418).

The spelling of 31142305 in words is "thirty-one million, one hundred forty-two thousand, three hundred five".