495531 has 8 divisors (see below), whose sum is σ = 734160. Its totient is φ = 330336.

The previous prime is 495527. The next prime is 495557. The reversal of 495531 is 135594.

It is not a de Polignac number, because 495531 - 2² = 495527 is a prime.

It is a super-2 number, since 2×495531² = 491101943922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 18353 = 495531 / (4 + 9 + 5 + 5 + 3 + 1).

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 495495 and 495504.

It is not an unprimeable number, because it can be changed into a prime (495511) 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, 9150 + ... + 9203.

It is an arithmetic number, because the mean of its divisors is an integer number (91770).

2⁴⁹⁵⁵³¹ is an apocalyptic number.

495531 is a deficient number, since it is larger than the sum of its proper divisors (238629).

495531 is a wasteful number, since it uses less digits than its factorization.

495531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18362 (or 18356 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 495531 is about 703.9396280932. The cubic root of 495531 is about 79.1328747132.

The spelling of 495531 in words is "four hundred ninety-five thousand, five hundred thirty-one".