5247543121 has 2 divisors, whose sum is σ = 5247543122. Its totient is φ = 5247543120.

The previous prime is 5247543109. The next prime is 5247543149. The reversal of 5247543121 is 1213457425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5228880721 + 18662400 = 72311^2 + 4320^2 .

It is a cyclic number.

It is not a de Polignac number, because 5247543121 - 2⁵ = 5247543089 is a prime.

It is not a weakly prime, because it can be changed into another prime (5247543421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2623771560 + 2623771561.

It is an arithmetic number, because the mean of its divisors is an integer number (2623771561).

Almost surely, 2^5247543121 is an apocalyptic number.

It is an amenable number.

5247543121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5247543121 is an equidigital number, since it uses as much as digits as its factorization.

5247543121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 5247543121 is about 72439.9276711400. The cubic root of 5247543121 is about 1737.7421634142.

The spelling of 5247543121 in words is "five billion, two hundred forty-seven million, five hundred forty-three thousand, one hundred twenty-one".