31423103 has 2 divisors, whose sum is σ = 31423104. Its totient is φ = 31423102.

The previous prime is 31423099. The next prime is 31423111. The reversal of 31423103 is 30132413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31423103 - 2² = 31423099 is a prime.

It is a super-2 number, since 2×31423103² = 1974822804297218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31423703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711551 + 15711552.

It is an arithmetic number, because the mean of its divisors is an integer number (15711552).

Almost surely, 2^31423103 is an apocalyptic number.

31423103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423103 is an equidigital number, since it uses as much as digits as its factorization.

31423103 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 31423103 is about 5605.6313649758. The cubic root of 31423103 is about 315.5607815365.

Adding to 31423103 its reverse (30132413), we get a palindrome (61555516).

The spelling of 31423103 in words is "thirty-one million, four hundred twenty-three thousand, one hundred three".