31142302 has 4 divisors (see below), whose sum is σ = 46713456. Its totient is φ = 15571150.

The previous prime is 31142297. The next prime is 31142303. The reversal of 31142302 is 20324113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7785574 + ... + 7785577.

It is an arithmetic number, because the mean of its divisors is an integer number (11678364).

Almost surely, 2^31142302 is an apocalyptic number.

31142302 is a deficient number, since it is larger than the sum of its proper divisors (15571154).

31142302 is a wasteful number, since it uses less digits than its factorization.

31142302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15571153.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31142302 is about 5580.5288279875. The cubic root of 31142302 is about 314.6180033930.

Adding to 31142302 its reverse (20324113), we get a palindrome (51466415).

The spelling of 31142302 in words is "thirty-one million, one hundred forty-two thousand, three hundred two".