31142706 has 16 divisors (see below), whose sum is σ = 71183424. Its totient is φ = 8897904.

The previous prime is 31142701. The next prime is 31142731. The reversal of 31142706 is 60724113.

It is not an unprimeable number, because it can be changed into a prime (31142701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370705 + ... + 370788.

It is an arithmetic number, because the mean of its divisors is an integer number (4448964).

Almost surely, 2^31142706 is an apocalyptic number.

31142706 is an abundant number, since it is smaller than the sum of its proper divisors (40040718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31142706 is a wasteful number, since it uses less digits than its factorization.

31142706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741505.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 31142706 is about 5580.5650251565. The cubic root of 31142706 is about 314.6193638696.

Adding to 31142706 its reverse (60724113), we get a palindrome (91866819).

The spelling of 31142706 in words is "thirty-one million, one hundred forty-two thousand, seven hundred six".