45243431 has 4 divisors (see below), whose sum is σ = 45271272. Its totient is φ = 45215592.

The previous prime is 45243413. The next prime is 45243433. The reversal of 45243431 is 13434254.

45243431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45243431 is a prime.

It is a super-2 number, since 2×45243431² = 4093936097303522, 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 45243431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45243433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11321 + ... + 14786.

It is an arithmetic number, because the mean of its divisors is an integer number (11317818).

Almost surely, 2^45243431 is an apocalyptic number.

45243431 is a deficient number, since it is larger than the sum of its proper divisors (27841).

45243431 is a wasteful number, since it uses less digits than its factorization.

45243431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27840.

The product of its digits is 5760, while the sum is 26.

The square root of 45243431 is about 6726.3237358902. The cubic root of 45243431 is about 356.3295537531.

Adding to 45243431 its reverse (13434254), we get a palindrome (58677685).

The spelling of 45243431 in words is "forty-five million, two hundred forty-three thousand, four hundred thirty-one".