31471123 has 2 divisors, whose sum is σ = 31471124. Its totient is φ = 31471122.

The previous prime is 31471109. The next prime is 31471147. The reversal of 31471123 is 32117413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31471123 - 2⁵ = 31471091 is a prime.

It is a super-2 number, since 2×31471123² = 1980863165762258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31471094 and 31471103.

It is not a weakly prime, because it can be changed into another prime (31471523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15735561 + 15735562.

It is an arithmetic number, because the mean of its divisors is an integer number (15735562).

Almost surely, 2^31471123 is an apocalyptic number.

31471123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31471123 is an equidigital number, since it uses as much as digits as its factorization.

31471123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 22.

The square root of 31471123 is about 5609.9129226754. The cubic root of 31471123 is about 315.7214437553.

Adding to 31471123 its reverse (32117413), we get a palindrome (63588536).

The spelling of 31471123 in words is "thirty-one million, four hundred seventy-one thousand, one hundred twenty-three".