545831 has 12 divisors (see below), whose sum is σ = 647976. Its totient is φ = 456720.

The previous prime is 545827. The next prime is 545843. The reversal of 545831 is 138545.

It is not a de Polignac number, because 545831 - 2² = 545827 is a prime.

It is a super-2 number, since 2×545831² = 595862961122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545831.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 545831.

It is not an unprimeable number, because it can be changed into a prime (545131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1400 + ... + 1746.

It is an arithmetic number, because the mean of its divisors is an integer number (53998).

2⁵⁴⁵⁸³¹ is an apocalyptic number.

545831 is a deficient number, since it is larger than the sum of its proper divisors (102145).

545831 is a wasteful number, since it uses less digits than its factorization.

545831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 371 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 545831 is about 738.8037628491. The cubic root of 545831 is about 81.7245866135.

It can be divided in two parts, 54 and 5831, that added together give a palindrome (5885).

The spelling of 545831 in words is "five hundred forty-five thousand, eight hundred thirty-one".