461631 has 4 divisors (see below), whose sum is σ = 615512. Its totient is φ = 307752.

The previous prime is 461627. The next prime is 461639. The reversal of 461631 is 136164.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 461631 - 2² = 461627 is a prime.

It is a super-2 number, since 2×461631² = 426206360322, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 461598 and 461607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76936 + ... + 76941.

It is an arithmetic number, because the mean of its divisors is an integer number (153878).

2⁴⁶¹⁶³¹ is an apocalyptic number.

461631 is a deficient number, since it is larger than the sum of its proper divisors (153881).

461631 is a wasteful number, since it uses less digits than its factorization.

461631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153880.

The product of its digits is 432, while the sum is 21.

The square root of 461631 is about 679.4343235369. The cubic root of 461631 is about 77.2855535383.

Adding to 461631 its reverse (136164), we get a palindrome (597795).

It can be divided in two parts, 46163 and 1, that added together give a palindrome (46164).

The spelling of 461631 in words is "four hundred sixty-one thousand, six hundred thirty-one".