31225471 has 2 divisors, whose sum is σ = 31225472. Its totient is φ = 31225470.

The previous prime is 31225459. The next prime is 31225487. The reversal of 31225471 is 17452213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31225471 is a prime.

It is a super-3 number, since 3×31225471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15612735 + 15612736.

It is an arithmetic number, because the mean of its divisors is an integer number (15612736).

Almost surely, 2^31225471 is an apocalyptic number.

31225471 is a deficient number, since it is larger than the sum of its proper divisors (1).

31225471 is an equidigital number, since it uses as much as digits as its factorization.

31225471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 25.

The square root of 31225471 is about 5587.9755726023. The cubic root of 31225471 is about 314.8978286259.

Adding to 31225471 its reverse (17452213), we get a palindrome (48677684).

The spelling of 31225471 in words is "thirty-one million, two hundred twenty-five thousand, four hundred seventy-one".