45123523 has 4 divisors (see below), whose sum is σ = 45149560. Its totient is φ = 45097488.

The previous prime is 45123521. The next prime is 45123541. The reversal of 45123523 is 32532154.

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

It is a cyclic number.

It is not a de Polignac number, because 45123523 - 2¹ = 45123521 is a prime.

It is a super-2 number, since 2×45123523² = 4072264655863058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45123521) 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, 10218 + ... + 13951.

It is an arithmetic number, because the mean of its divisors is an integer number (11287390).

Almost surely, 2^45123523 is an apocalyptic number.

45123523 is a deficient number, since it is larger than the sum of its proper divisors (26037).

45123523 is a wasteful number, since it uses less digits than its factorization.

45123523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26036.

The product of its digits is 3600, while the sum is 25.

The square root of 45123523 is about 6717.4044838762. The cubic root of 45123523 is about 356.0144835878.

Adding to 45123523 its reverse (32532154), we get a palindrome (77655677).

The spelling of 45123523 in words is "forty-five million, one hundred twenty-three thousand, five hundred twenty-three".