49431 has 4 divisors (see below), whose sum is σ = 65912. Its totient is φ = 32952.

The previous prime is 49429. The next prime is 49433. The reversal of 49431 is 13494.

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

It is an interprime number because it is at equal distance from previous prime (49429) and next prime (49433).

It is not a de Polignac number, because 49431 - 2¹ = 49429 is a prime.

It is a super-2 number, since 2×49431² = 4886847522, which contains 22 as substring.

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 = 49398 and 49407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8236 + ... + 8241.

It is an arithmetic number, because the mean of its divisors is an integer number (16478).

2⁴⁹⁴³¹ is an apocalyptic number.

49431 is a deficient number, since it is larger than the sum of its proper divisors (16481).

49431 is a wasteful number, since it uses less digits than its factorization.

49431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16480.

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

The square root of 49431 is about 222.3308345687. The cubic root of 49431 is about 36.7000339052.

Subtracting from 49431 its reverse (13494), we obtain a cube (35937 = 33³).

It can be divided in two parts, 494 and 31, that added together give a palindrome (525).

The spelling of 49431 in words is "forty-nine thousand, four hundred thirty-one".