5431121503 has 4 divisors (see below), whose sum is σ = 5433802920. Its totient is φ = 5428440088.

The previous prime is 5431121497. The next prime is 5431121561. The reversal of 5431121503 is 3051211345.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5431121503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5431121573) 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, 1337668 + ... + 1341721.

It is an arithmetic number, because the mean of its divisors is an integer number (1358450730).

Almost surely, 2^5431121503 is an apocalyptic number.

5431121503 is a deficient number, since it is larger than the sum of its proper divisors (2681417).

5431121503 is a wasteful number, since it uses less digits than its factorization.

5431121503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681416.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 5431121503 is about 73696.1430673275. The cubic root of 5431121503 is about 1757.7745527950.

Adding to 5431121503 its reverse (3051211345), we get a palindrome (8482332848).

The spelling of 5431121503 in words is "five billion, four hundred thirty-one million, one hundred twenty-one thousand, five hundred three".