31231063 has 2 divisors, whose sum is σ = 31231064. Its totient is φ = 31231062.

The previous prime is 31231051. The next prime is 31231069. The reversal of 31231063 is 36013213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31231063 is a prime.

It is a super-2 number, since 2×31231063² = 1950758592219938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31231063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31231069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615531 + 15615532.

It is an arithmetic number, because the mean of its divisors is an integer number (15615532).

Almost surely, 2^31231063 is an apocalyptic number.

31231063 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231063 is an equidigital number, since it uses as much as digits as its factorization.

31231063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 31231063 is about 5588.4759102997. The cubic root of 31231063 is about 314.9166252845.

Adding to 31231063 its reverse (36013213), we get a palindrome (67244276).

It can be divided in two parts, 3123 and 1063, that added together give a triangular number (4186 = T₉₁).

The spelling of 31231063 in words is "thirty-one million, two hundred thirty-one thousand, sixty-three".