53216723 has 4 divisors (see below), whose sum is σ = 60819120. Its totient is φ = 45614328.

The previous prime is 53216707. The next prime is 53216731. The reversal of 53216723 is 32761235.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53216723 - 2⁴ = 53216707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53216923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3801188 + ... + 3801201.

It is an arithmetic number, because the mean of its divisors is an integer number (15204780).

Almost surely, 2^53216723 is an apocalyptic number.

53216723 is a deficient number, since it is larger than the sum of its proper divisors (7602397).

53216723 is an equidigital number, since it uses as much as digits as its factorization.

53216723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7602396.

The product of its digits is 7560, while the sum is 29.

The square root of 53216723 is about 7294.9793008617. The cubic root of 53216723 is about 376.1398750564.

Adding to 53216723 its reverse (32761235), we get a palindrome (85977958).

The spelling of 53216723 in words is "fifty-three million, two hundred sixteen thousand, seven hundred twenty-three".