5431005121 has 4 divisors (see below), whose sum is σ = 5443548292. Its totient is φ = 5418461952.

The previous prime is 5431005119. The next prime is 5431005137. The reversal of 5431005121 is 1215001345.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 963419521 + 4467585600 = 31039^2 + 66840^2 .

It is a cyclic number.

It is not a de Polignac number, because 5431005121 - 2¹ = 5431005119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5431005092 and 5431005101.

It is not an unprimeable number, because it can be changed into a prime (5431005161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6270936 + ... + 6271801.

It is an arithmetic number, because the mean of its divisors is an integer number (1360887073).

Almost surely, 2^5431005121 is an apocalyptic number.

It is an amenable number.

5431005121 is a deficient number, since it is larger than the sum of its proper divisors (12543171).

5431005121 is a wasteful number, since it uses less digits than its factorization.

5431005121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12543170.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 5431005121 is about 73695.3534559676. The cubic root of 5431005121 is about 1757.7619970838.

Adding to 5431005121 its reverse (1215001345), we get a palindrome (6646006466).

The spelling of 5431005121 in words is "five billion, four hundred thirty-one million, five thousand, one hundred twenty-one".