53216965 has 8 divisors (see below), whose sum is σ = 64327320. Its totient is φ = 42262272.

The previous prime is 53216959. The next prime is 53216971. The reversal of 53216965 is 56961235.

It is an interprime number because it is at equal distance from previous prime (53216959) and next prime (53216971).

It can be written as a sum of positive squares in 4 ways, for example, as 10797796 + 42419169 = 3286^2 + 6513^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 53216965 - 2⁹ = 53216453 is a prime.

It is a super-2 number, since 2×53216965² = 5664090727622450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38160 + ... + 39529.

It is an arithmetic number, because the mean of its divisors is an integer number (8040915).

Almost surely, 2^53216965 is an apocalyptic number.

It is an amenable number.

53216965 is a deficient number, since it is larger than the sum of its proper divisors (11110355).

53216965 is a wasteful number, since it uses less digits than its factorization.

53216965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77831.

The product of its digits is 48600, while the sum is 37.

The square root of 53216965 is about 7294.9958875931. The cubic root of 53216965 is about 376.1404452137.

The spelling of 53216965 in words is "fifty-three million, two hundred sixteen thousand, nine hundred sixty-five".