55156729 has 8 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 53719536.

The previous prime is 55156723. The next prime is 55156733. The reversal of 55156729 is 92765155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55156729 - 2⁹ = 55156217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55156691 and 55156700.

It is not an unprimeable number, because it can be changed into a prime (55156723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3624 + ... + 11110.

It is an arithmetic number, because the mean of its divisors is an integer number (7076160).

Almost surely, 2^55156729 is an apocalyptic number.

It is an amenable number.

55156729 is a deficient number, since it is larger than the sum of its proper divisors (1452551).

55156729 is a wasteful number, since it uses less digits than its factorization.

55156729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7679.

The product of its digits is 94500, while the sum is 40.

The square root of 55156729 is about 7426.7576370850. The cubic root of 55156729 is about 380.6561355764.

The spelling of 55156729 in words is "fifty-five million, one hundred fifty-six thousand, seven hundred twenty-nine".