55150729 has 2 divisors, whose sum is σ = 55150730. Its totient is φ = 55150728.

The previous prime is 55150727. The next prime is 55150751. The reversal of 55150729 is 92705155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34539129 + 20611600 = 5877^2 + 4540^2 .

It is a cyclic number.

It is not a de Polignac number, because 55150729 - 2¹ = 55150727 is a prime.

Together with 55150727, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 55150694 and 55150703.

It is not a weakly prime, because it can be changed into another prime (55150727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27575364 + 27575365.

It is an arithmetic number, because the mean of its divisors is an integer number (27575365).

Almost surely, 2^55150729 is an apocalyptic number.

It is an amenable number.

55150729 is a deficient number, since it is larger than the sum of its proper divisors (1).

55150729 is an equidigital number, since it uses as much as digits as its factorization.

55150729 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 55150729 is about 7426.3536813163. The cubic root of 55150729 is about 380.6423323670.

The spelling of 55150729 in words is "fifty-five million, one hundred fifty thousand, seven hundred twenty-nine".