53243215 has 8 divisors (see below), whose sum is σ = 65450448. Its totient is φ = 41555520.

The previous prime is 53243189. The next prime is 53243219. The reversal of 53243215 is 51234235.

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

It is a de Polignac number, because none of the positive numbers 2^k-53243215 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53243215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53243219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129657 + ... + 130066.

It is an arithmetic number, because the mean of its divisors is an integer number (8181306).

Almost surely, 2^53243215 is an apocalyptic number.

53243215 is a deficient number, since it is larger than the sum of its proper divisors (12207233).

53243215 is a wasteful number, since it uses less digits than its factorization.

53243215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259769.

The product of its digits is 3600, while the sum is 25.

The square root of 53243215 is about 7296.7948443135. The cubic root of 53243215 is about 376.2022805306.

The spelling of 53243215 in words is "fifty-three million, two hundred forty-three thousand, two hundred fifteen".