53087305 has 8 divisors (see below), whose sum is σ = 63761544. Its totient is φ = 42432000.

The previous prime is 53087303. The next prime is 53087329. The reversal of 53087305 is 50378035.

It can be written as a sum of positive squares in 4 ways, for example, as 727609 + 52359696 = 853^2 + 7236^2 .

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

It is not a de Polignac number, because 53087305 - 2¹ = 53087303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53087303) 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, 2425 + ... + 10585.

It is an arithmetic number, because the mean of its divisors is an integer number (7970193).

Almost surely, 2^53087305 is an apocalyptic number.

It is an amenable number.

53087305 is a deficient number, since it is larger than the sum of its proper divisors (10674239).

53087305 is a wasteful number, since it uses less digits than its factorization.

53087305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 53087305 is about 7286.1035540267. The cubic root of 53087305 is about 375.8347154366.

The spelling of 53087305 in words is "fifty-three million, eighty-seven thousand, three hundred five".