545631 has 8 divisors (see below), whose sum is σ = 751104. Its totient is φ = 351960.

The previous prime is 545621. The next prime is 545641. The reversal of 545631 is 136545.

It is an interprime number because it is at equal distance from previous prime (545621) and next prime (545641).

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

It is not a de Polignac number, because 545631 - 2⁵ = 545599 is a prime.

It is a super-2 number, since 2×545631² = 595426376322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2841 + ... + 3026.

It is an arithmetic number, because the mean of its divisors is an integer number (93888).

2⁵⁴⁵⁶³¹ is an apocalyptic number.

545631 is a deficient number, since it is larger than the sum of its proper divisors (205473).

545631 is a wasteful number, since it uses less digits than its factorization.

545631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5901.

The product of its digits is 1800, while the sum is 24.

The square root of 545631 is about 738.6683965082. The cubic root of 545631 is about 81.7146037225.

It can be divided in two parts, 545 and 631, that added together give a triangular number (1176 = T₄₈).

The spelling of 545631 in words is "five hundred forty-five thousand, six hundred thirty-one".