55115213297 has 2 divisors, whose sum is σ = 55115213298. Its totient is φ = 55115213296.

The previous prime is 55115213249. The next prime is 55115213323. The reversal of 55115213297 is 79231251155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45382206961 + 9733006336 = 213031^2 + 98656^2 .

It is a cyclic number.

It is not a de Polignac number, because 55115213297 - 2³⁴ = 37935344113 is a prime.

It is a super-2 number, since 2×55115213297² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55115213597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27557606648 + 27557606649.

It is an arithmetic number, because the mean of its divisors is an integer number (27557606649).

Almost surely, 2^55115213297 is an apocalyptic number.

It is an amenable number.

55115213297 is a deficient number, since it is larger than the sum of its proper divisors (1).

55115213297 is an equidigital number, since it uses as much as digits as its factorization.

55115213297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94500, while the sum is 41.

The spelling of 55115213297 in words is "fifty-five billion, one hundred fifteen million, two hundred thirteen thousand, two hundred ninety-seven".