5145423521 has 4 divisors (see below), whose sum is σ = 5880484032. Its totient is φ = 4410363012.

The previous prime is 5145423511. The next prime is 5145423527. The reversal of 5145423521 is 1253245415.

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.

It is a cyclic number.

It is not a de Polignac number, because 5145423521 - 2¹⁸ = 5145161377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5145423527) 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, 367530245 + ... + 367530258.

It is an arithmetic number, because the mean of its divisors is an integer number (1470121008).

Almost surely, 2^5145423521 is an apocalyptic number.

It is an amenable number.

5145423521 is a deficient number, since it is larger than the sum of its proper divisors (735060511).

5145423521 is an equidigital number, since it uses as much as digits as its factorization.

5145423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735060510.

The product of its digits is 24000, while the sum is 32.

The square root of 5145423521 is about 71731.6075450704. The cubic root of 5145423521 is about 1726.3958200107.

Adding to 5145423521 its reverse (1253245415), we get a palindrome (6398668936).

The spelling of 5145423521 in words is "five billion, one hundred forty-five million, four hundred twenty-three thousand, five hundred twenty-one".