631255223 has 2 divisors, whose sum is σ = 631255224. Its totient is φ = 631255222.

The previous prime is 631255213. The next prime is 631255277. The reversal of 631255223 is 322552136.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631255223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631255213) 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, 315627611 + 315627612.

It is an arithmetic number, because the mean of its divisors is an integer number (315627612).

Almost surely, 2^631255223 is an apocalyptic number.

631255223 is a deficient number, since it is larger than the sum of its proper divisors (1).

631255223 is an equidigital number, since it uses as much as digits as its factorization.

631255223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 29.

The square root of 631255223 is about 25124.7929941721. The cubic root of 631255223 is about 857.8308517123.

The spelling of 631255223 in words is "six hundred thirty-one million, two hundred fifty-five thousand, two hundred twenty-three".