31142303 has 2 divisors, whose sum is σ = 31142304. Its totient is φ = 31142302.

The previous prime is 31142297. The next prime is 31142381. The reversal of 31142303 is 30324113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31142303 - 2¹⁸ = 30880159 is a prime.

It is a super-2 number, since 2×31142303² = 1939686072287618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31142393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571151 + 15571152.

It is an arithmetic number, because the mean of its divisors is an integer number (15571152).

Almost surely, 2^31142303 is an apocalyptic number.

31142303 is a deficient number, since it is larger than the sum of its proper divisors (1).

31142303 is an equidigital number, since it uses as much as digits as its factorization.

31142303 is an evil number, because the sum of its binary digits is even.

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

The square root of 31142303 is about 5580.5289175848. The cubic root of 31142303 is about 314.6180067605.

Adding to 31142303 its reverse (30324113), we get a palindrome (61466416).

The spelling of 31142303 in words is "thirty-one million, one hundred forty-two thousand, three hundred three".