505631133 has 16 divisors (see below), whose sum is σ = 856095360. Its totient is φ = 288931968.

The previous prime is 505631129. The next prime is 505631171. The reversal of 505631133 is 331136505.

It is not a de Polignac number, because 505631133 - 2² = 505631129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 505631097 and 505631106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505633133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1337460 + ... + 1337837.

It is an arithmetic number, because the mean of its divisors is an integer number (53505960).

Almost surely, 2^505631133 is an apocalyptic number.

It is an amenable number.

505631133 is a deficient number, since it is larger than the sum of its proper divisors (350464227).

505631133 is a wasteful number, since it uses less digits than its factorization.

505631133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675313 (or 2675307 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

The square root of 505631133 is about 22486.2431944511. The cubic root of 505631133 is about 796.6690318338.

Adding to 505631133 its reverse (331136505), we get a palindrome (836767638).

The spelling of 505631133 in words is "five hundred five million, six hundred thirty-one thousand, one hundred thirty-three".