5245431521 has 16 divisors (see below), whose sum is σ = 6019963200. Its totient is φ = 4526088000.

The previous prime is 5245431439. The next prime is 5245431533. The reversal of 5245431521 is 1251345425.

It is a de Polignac number, because none of the positive numbers 2^k-5245431521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5245431551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120530 + ... + 158171.

It is an arithmetic number, because the mean of its divisors is an integer number (376247700).

Almost surely, 2^5245431521 is an apocalyptic number.

It is an amenable number.

5245431521 is a deficient number, since it is larger than the sum of its proper divisors (774531679).

5245431521 is a wasteful number, since it uses less digits than its factorization.

5245431521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278800.

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

The square root of 5245431521 is about 72425.3513695308. The cubic root of 5245431521 is about 1737.5090442467.

Adding to 5245431521 its reverse (1251345425), we get a palindrome (6496776946).

The spelling of 5245431521 in words is "five billion, two hundred forty-five million, four hundred thirty-one thousand, five hundred twenty-one".