663226431 has 32 divisors (see below), whose sum is σ = 1046016000. Its totient is φ = 365783040.

The previous prime is 663226429. The next prime is 663226439. The reversal of 663226431 is 134622366.

It is not a de Polignac number, because 663226431 - 2¹ = 663226429 is a prime.

It is a super-2 number, since 2×663226431² = 879738597553995522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663226392 and 663226401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663226439) 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 in 31 ways as a sum of consecutive naturals, for example, 291165 + ... + 293433.

It is an arithmetic number, because the mean of its divisors is an integer number (32688000).

Almost surely, 2^663226431 is an apocalyptic number.

663226431 is a deficient number, since it is larger than the sum of its proper divisors (382789569).

663226431 is a wasteful number, since it uses less digits than its factorization.

663226431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759.

The product of its digits is 31104, while the sum is 33.

The square root of 663226431 is about 25753.1829294944. The cubic root of 663226431 is about 872.0752112098.

Adding to 663226431 its reverse (134622366), we get a palindrome (797848797).

The spelling of 663226431 in words is "six hundred sixty-three million, two hundred twenty-six thousand, four hundred thirty-one".