31303142 has 16 divisors (see below), whose sum is σ = 51061920. Its totient is φ = 14306112.

The previous prime is 31303133. The next prime is 31303157. The reversal of 31303142 is 24130313.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31303142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167 + ... + 8522.

It is an arithmetic number, because the mean of its divisors is an integer number (3191370).

Almost surely, 2^31303142 is an apocalyptic number.

31303142 is a deficient number, since it is larger than the sum of its proper divisors (19758778).

31303142 is a wasteful number, since it uses less digits than its factorization.

31303142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11807.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 31303142 is about 5594.9210897027. The cubic root of 31303142 is about 315.1587072926.

Adding to 31303142 its reverse (24130313), we get a palindrome (55433455).

The spelling of 31303142 in words is "thirty-one million, three hundred three thousand, one hundred forty-two".