31142045 has 32 divisors (see below), whose sum is σ = 45463680. Its totient is φ = 20183040.

The previous prime is 31142039. The next prime is 31142077. The reversal of 31142045 is 54024113.

It is not a de Polignac number, because 31142045 - 2¹² = 31137949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16889 + ... + 18641.

It is an arithmetic number, because the mean of its divisors is an integer number (1420740).

Almost surely, 2^31142045 is an apocalyptic number.

It is an amenable number.

31142045 is a deficient number, since it is larger than the sum of its proper divisors (14321635).

31142045 is a wasteful number, since it uses less digits than its factorization.

31142045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 31142045 is about 5580.5058014485. The cubic root of 31142045 is about 314.6171379351.

Adding to 31142045 its reverse (54024113), we get a palindrome (85166158).

The spelling of 31142045 in words is "thirty-one million, one hundred forty-two thousand, forty-five".