631135223 has 8 divisors (see below), whose sum is σ = 651810240. Its totient is φ = 610762240.

The previous prime is 631135189. The next prime is 631135229. The reversal of 631135223 is 322531136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631135223 - 2¹⁰ = 631134199 is a prime.

It is a super-2 number, since 2×631135223² = 796663339422519458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631135192 and 631135201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631135229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71258 + ... + 79623.

It is an arithmetic number, because the mean of its divisors is an integer number (81476280).

Almost surely, 2^631135223 is an apocalyptic number.

631135223 is a deficient number, since it is larger than the sum of its proper divisors (20675017).

631135223 is a wasteful number, since it uses less digits than its factorization.

631135223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151017.

The product of its digits is 3240, while the sum is 26.

The square root of 631135223 is about 25122.4048012924. The cubic root of 631135223 is about 857.7764911188.

Adding to 631135223 its reverse (322531136), we get a palindrome (953666359).

The spelling of 631135223 in words is "six hundred thirty-one million, one hundred thirty-five thousand, two hundred twenty-three".