45243140521 has 4 divisors (see below), whose sum is σ = 45309382992. Its totient is φ = 45176898052.

The previous prime is 45243140507. The next prime is 45243140531. The reversal of 45243140521 is 12504134254.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12504134254 = 2 ⋅6252067127.

It is a cyclic number.

It is not a de Polignac number, because 45243140521 - 2²¹ = 45241043369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45243140531) 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, 33120211 + ... + 33121576.

It is an arithmetic number, because the mean of its divisors is an integer number (11327345748).

Almost surely, 2^45243140521 is an apocalyptic number.

It is an amenable number.

45243140521 is a deficient number, since it is larger than the sum of its proper divisors (66242471).

45243140521 is an equidigital number, since it uses as much as digits as its factorization.

45243140521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66242470.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 45243140521 its reverse (12504134254), we get a palindrome (57747274775).

The spelling of 45243140521 in words is "forty-five billion, two hundred forty-three million, one hundred forty thousand, five hundred twenty-one".