663042231 has 6 divisors (see below), whose sum is σ = 957727680. Its totient is φ = 442028148.

The previous prime is 663042227. The next prime is 663042253. The reversal of 663042231 is 132240366.

663042231 is a `hidden beast` number, since 6 + 630 + 4 + 2 + 23 + 1 = 666.

It is not a de Polignac number, because 663042231 - 2² = 663042227 is a prime.

It is a super-2 number, since 2×663042231² = 879250000178914722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663042195 and 663042204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663042131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36835671 + ... + 36835688.

It is an arithmetic number, because the mean of its divisors is an integer number (159621280).

Almost surely, 2^663042231 is an apocalyptic number.

663042231 is a deficient number, since it is larger than the sum of its proper divisors (294685449).

663042231 is a wasteful number, since it uses less digits than its factorization.

663042231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73671365 (or 73671362 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 663042231 is about 25749.6064241767. The cubic root of 663042231 is about 871.9944689876.

Adding to 663042231 its reverse (132240366), we get a palindrome (795282597).

The spelling of 663042231 in words is "six hundred sixty-three million, forty-two thousand, two hundred thirty-one".