45643231 has 4 divisors (see below), whose sum is σ = 45832864. Its totient is φ = 45453600.

The previous prime is 45643219. The next prime is 45643261. The reversal of 45643231 is 13234654.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13234654 = 2 ⋅6617327.

It is a cyclic number.

It is not a de Polignac number, because 45643231 - 2¹³ = 45635039 is a prime.

It is a super-2 number, since 2×45643231² = 4166609072238722, 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 45643231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45643211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94455 + ... + 94936.

It is an arithmetic number, because the mean of its divisors is an integer number (11458216).

Almost surely, 2^45643231 is an apocalyptic number.

45643231 is a deficient number, since it is larger than the sum of its proper divisors (189633).

45643231 is a wasteful number, since it uses less digits than its factorization.

45643231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189632.

The product of its digits is 8640, while the sum is 28.

The square root of 45643231 is about 6755.9774274342. The cubic root of 45643231 is about 357.3760627978.

Adding to 45643231 its reverse (13234654), we get a palindrome (58877885).

The spelling of 45643231 in words is "forty-five million, six hundred forty-three thousand, two hundred thirty-one".