505742631 has 8 divisors (see below), whose sum is σ = 685752960. Its totient is φ = 331447032.

The previous prime is 505742621. The next prime is 505742641. The reversal of 505742631 is 136247505.

It is an interprime number because it is at equal distance from previous prime (505742621) and next prime (505742641).

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

It is not a de Polignac number, because 505742631 - 2⁹ = 505742119 is a prime.

It is a super-2 number, since 2×505742631² = 511551217621604322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 505742592 and 505742601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505742621) 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 7 ways as a sum of consecutive naturals, for example, 1428475 + ... + 1428828.

It is an arithmetic number, because the mean of its divisors is an integer number (85719120).

Almost surely, 2^505742631 is an apocalyptic number.

505742631 is a deficient number, since it is larger than the sum of its proper divisors (180010329).

505742631 is a wasteful number, since it uses less digits than its factorization.

505742631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857365.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 505742631 is about 22488.7223069698. The cubic root of 505742631 is about 796.7275860311.

The spelling of 505742631 in words is "five hundred five million, seven hundred forty-two thousand, six hundred thirty-one".