55015729 has 2 divisors, whose sum is σ = 55015730. Its totient is φ = 55015728.

The previous prime is 55015711. The next prime is 55015759. The reversal of 55015729 is 92751055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28729600 + 26286129 = 5360^2 + 5127^2 .

It is a cyclic number.

It is not a de Polignac number, because 55015729 - 2⁹ = 55015217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55015694 and 55015703.

It is not a weakly prime, because it can be changed into another prime (55015759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27507864 + 27507865.

It is an arithmetic number, because the mean of its divisors is an integer number (27507865).

Almost surely, 2^55015729 is an apocalyptic number.

It is an amenable number.

55015729 is a deficient number, since it is larger than the sum of its proper divisors (1).

55015729 is an equidigital number, since it uses as much as digits as its factorization.

55015729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 55015729 is about 7417.2588602529. The cubic root of 55015729 is about 380.3314951295.

The spelling of 55015729 in words is "fifty-five million, fifteen thousand, seven hundred twenty-nine".