53250729 has 16 divisors (see below), whose sum is σ = 82357248. Its totient is φ = 29974032.

The previous prime is 53250707. The next prime is 53250737. The reversal of 53250729 is 92705235.

It is not a de Polignac number, because 53250729 - 2⁷ = 53250601 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53250729.

It is not an unprimeable number, because it can be changed into a prime (53250739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17517 + ... + 20330.

It is an arithmetic number, because the mean of its divisors is an integer number (5147328).

Almost surely, 2^53250729 is an apocalyptic number.

It is an amenable number.

53250729 is a deficient number, since it is larger than the sum of its proper divisors (29106519).

53250729 is a wasteful number, since it uses less digits than its factorization.

53250729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37924.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 53250729 is about 7297.3097097492. The cubic root of 53250729 is about 376.2199770012.

The spelling of 53250729 in words is "fifty-three million, two hundred fifty thousand, seven hundred twenty-nine".