53223729 has 16 divisors (see below), whose sum is σ = 79060800. Its totient is φ = 31622976.

The previous prime is 53223727. The next prime is 53223733. The reversal of 53223729 is 92732235.

It is not a de Polignac number, because 53223729 - 2¹ = 53223727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53223729.

It is not an unprimeable number, because it can be changed into a prime (53223721) 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, 22399 + ... + 24660.

It is an arithmetic number, because the mean of its divisors is an integer number (4941300).

Almost surely, 2^53223729 is an apocalyptic number.

It is an amenable number.

53223729 is a deficient number, since it is larger than the sum of its proper divisors (25837071).

53223729 is a wasteful number, since it uses less digits than its factorization.

53223729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47104.

The product of its digits is 22680, while the sum is 33.

The square root of 53223729 is about 7295.4594783331. The cubic root of 53223729 is about 376.1563806470.

The spelling of 53223729 in words is "fifty-three million, two hundred twenty-three thousand, seven hundred twenty-nine".