5121215511553 has 2 divisors, whose sum is σ = 5121215511554. Its totient is φ = 5121215511552.

The previous prime is 5121215511521. The next prime is 5121215511583. The reversal of 5121215511553 is 3551155121215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4246435033344 + 874780478209 = 2060688^2 + 935297^2 .

It is a cyclic number.

It is not a de Polignac number, because 5121215511553 - 2⁵ = 5121215511521 is a prime.

It is not a weakly prime, because it can be changed into another prime (5121215511583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560607755776 + 2560607755777.

It is an arithmetic number, because the mean of its divisors is an integer number (2560607755777).

Almost surely, 2^{5121215511553} is an apocalyptic number.

It is an amenable number.

5121215511553 is a deficient number, since it is larger than the sum of its proper divisors (1).

5121215511553 is an equidigital number, since it uses as much as digits as its factorization.

5121215511553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37500, while the sum is 37.

The spelling of 5121215511553 in words is "five trillion, one hundred twenty-one billion, two hundred fifteen million, five hundred eleven thousand, five hundred fifty-three".