31461223 has 2 divisors, whose sum is σ = 31461224. Its totient is φ = 31461222.

The previous prime is 31461193. The next prime is 31461229. The reversal of 31461223 is 32216413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31461223 - 2⁵ = 31461191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31461194 and 31461203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31461229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15730611 + 15730612.

It is an arithmetic number, because the mean of its divisors is an integer number (15730612).

Almost surely, 2^31461223 is an apocalyptic number.

31461223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31461223 is an equidigital number, since it uses as much as digits as its factorization.

31461223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 31461223 is about 5609.0304866349. The cubic root of 31461223 is about 315.6883343543.

Adding to 31461223 its reverse (32216413), we get a palindrome (63677636).

It can be divided in two parts, 31461 and 223, that added together give a square (31684 = 178²).

The spelling of 31461223 in words is "thirty-one million, four hundred sixty-one thousand, two hundred twenty-three".