53705215 has 8 divisors (see below), whose sum is σ = 64704528. Its totient is φ = 42792000.

The previous prime is 53705213. The next prime is 53705243. The reversal of 53705215 is 51250735.

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

It is not a de Polignac number, because 53705215 - 2¹ = 53705213 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53705213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20142 + ... + 22651.

It is an arithmetic number, because the mean of its divisors is an integer number (8088066).

Almost surely, 2^53705215 is an apocalyptic number.

53705215 is a deficient number, since it is larger than the sum of its proper divisors (10999313).

53705215 is a wasteful number, since it uses less digits than its factorization.

53705215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43049.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 53705215 is about 7328.3842011729. The cubic root of 53705215 is about 377.2872710493.

It can be divided in two parts, 5370 and 5215, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 53705215 in words is "fifty-three million, seven hundred five thousand, two hundred fifteen".