5415555121 has 2 divisors, whose sum is σ = 5415555122. Its totient is φ = 5415555120.

The previous prime is 5415555113. The next prime is 5415555157. The reversal of 5415555121 is 1215555145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5209230625 + 206324496 = 72175^2 + 14364^2 .

It is a cyclic number.

It is not a de Polignac number, because 5415555121 - 2³ = 5415555113 is a prime.

It is not a weakly prime, because it can be changed into another prime (5415555221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2707777560 + 2707777561.

It is an arithmetic number, because the mean of its divisors is an integer number (2707777561).

Almost surely, 2^5415555121 is an apocalyptic number.

It is an amenable number.

5415555121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5415555121 is an equidigital number, since it uses as much as digits as its factorization.

5415555121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25000, while the sum is 34.

The square root of 5415555121 is about 73590.4553661682. The cubic root of 5415555121 is about 1756.0936002094.

The spelling of 5415555121 in words is "five billion, four hundred fifteen million, five hundred fifty-five thousand, one hundred twenty-one".