45431 has 4 divisors (see below), whose sum is σ = 45864. Its totient is φ = 45000.

The previous prime is 45427. The next prime is 45433. The reversal of 45431 is 13454.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 45431 - 2² = 45427 is a prime.

It is a super-2 number, since 2×45431² = 4127951522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45433) 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, 56 + ... + 306.

It is an arithmetic number, because the mean of its divisors is an integer number (11466).

2⁴⁵⁴³¹ is an apocalyptic number.

45431 is a deficient number, since it is larger than the sum of its proper divisors (433).

45431 is a wasteful number, since it uses less digits than its factorization.

45431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432.

The product of its digits is 240, while the sum is 17.

The square root of 45431 is about 213.1454902174. The cubic root of 45431 is about 35.6821295323.

Adding to 45431 its reverse (13454), we get a palindrome (58885).

The spelling of 45431 in words is "forty-five thousand, four hundred thirty-one".