45123531 has 8 divisors (see below), whose sum is σ = 60889920. Its totient is φ = 29719752.

The previous prime is 45123521. The next prime is 45123541. The reversal of 45123531 is 13532154.

45123531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (45123521) and next prime (45123541).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45123531 - 2¹⁰ = 45122507 is a prime.

It is a super-2 number, since 2×45123531² = 4072266099815922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45123521) 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 7 ways as a sum of consecutive naturals, for example, 90361 + ... + 90858.

It is an arithmetic number, because the mean of its divisors is an integer number (7611240).

Almost surely, 2^45123531 is an apocalyptic number.

45123531 is a deficient number, since it is larger than the sum of its proper divisors (15766389).

45123531 is a wasteful number, since it uses less digits than its factorization.

45123531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181305.

The product of its digits is 1800, while the sum is 24.

The square root of 45123531 is about 6717.4050793443. The cubic root of 45123531 is about 356.0145046272.

Adding to 45123531 its reverse (13532154), we get a palindrome (58655685).

It can be divided in two parts, 45123 and 531, that added together give a palindrome (45654).

The spelling of 45123531 in words is "forty-five million, one hundred twenty-three thousand, five hundred thirty-one".