55111517 has 2 divisors, whose sum is σ = 55111518. Its totient is φ = 55111516.

The previous prime is 55111493. The next prime is 55111541. The reversal of 55111517 is 71511155.

It is a balanced prime because it is at equal distance from previous prime (55111493) and next prime (55111541).

It can be written as a sum of positive squares in only one way, i.e., 45954841 + 9156676 = 6779^2 + 3026^2 .

It is a cyclic number.

It is not a de Polignac number, because 55111517 - 2⁸ = 55111261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55111577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27555758 + 27555759.

It is an arithmetic number, because the mean of its divisors is an integer number (27555759).

Almost surely, 2^55111517 is an apocalyptic number.

It is an amenable number.

55111517 is a deficient number, since it is larger than the sum of its proper divisors (1).

55111517 is an equidigital number, since it uses as much as digits as its factorization.

55111517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 875, while the sum is 26.

The square root of 55111517 is about 7423.7131544800. The cubic root of 55111517 is about 380.5520991329.

The spelling of 55111517 in words is "fifty-five million, one hundred eleven thousand, five hundred seventeen".