31142075 has 6 divisors (see below), whose sum is σ = 38616204. Its totient is φ = 24913640.

The previous prime is 31142039. The next prime is 31142077. The reversal of 31142075 is 57024113.

It is not a de Polignac number, because 31142075 - 2⁸ = 31141819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31142075.

It is not an unprimeable number, because it can be changed into a prime (31142077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 622817 + ... + 622866.

It is an arithmetic number, because the mean of its divisors is an integer number (6436034).

Almost surely, 2^31142075 is an apocalyptic number.

31142075 is a deficient number, since it is larger than the sum of its proper divisors (7474129).

31142075 is a wasteful number, since it uses less digits than its factorization.

31142075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245693 (or 1245688 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 31142075 is about 5580.5084893762. The cubic root of 31142075 is about 314.6172389616.

Adding to 31142075 its reverse (57024113), we get a palindrome (88166188).

The spelling of 31142075 in words is "thirty-one million, one hundred forty-two thousand, seventy-five".