53216515 has 16 divisors (see below), whose sum is σ = 69888096. Its totient is φ = 38579200.

The previous prime is 53216509. The next prime is 53216519. The reversal of 53216515 is 51561235.

It is not a de Polignac number, because 53216515 - 2³ = 53216507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53216519) 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, 18045 + ... + 20785.

It is an arithmetic number, because the mean of its divisors is an integer number (4368006).

Almost surely, 2^53216515 is an apocalyptic number.

53216515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53216515 is a deficient number, since it is larger than the sum of its proper divisors (16671581).

53216515 is a wasteful number, since it uses less digits than its factorization.

53216515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110.

The product of its digits is 4500, while the sum is 28.

The square root of 53216515 is about 7294.9650444673. The cubic root of 53216515 is about 376.1393850024.

The spelling of 53216515 in words is "fifty-three million, two hundred sixteen thousand, five hundred fifteen".