53220723 has 12 divisors (see below), whose sum is σ = 71967960. Its totient is φ = 34983936.

The previous prime is 53220719. The next prime is 53220733. The reversal of 53220723 is 32702235.

53220723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53220723 - 2² = 53220719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53220693 and 53220702.

It is not an unprimeable number, because it can be changed into a prime (53220703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14323 + ... + 17651.

It is an arithmetic number, because the mean of its divisors is an integer number (5997330).

Almost surely, 2^53220723 is an apocalyptic number.

53220723 is a deficient number, since it is larger than the sum of its proper divisors (18747237).

53220723 is an equidigital number, since it uses as much as digits as its factorization.

53220723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478 (or 3405 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 53220723 is about 7295.2534568718. The cubic root of 53220723 is about 376.1492989224.

Adding to 53220723 its reverse (32702235), we get a palindrome (85922958).

The spelling of 53220723 in words is "fifty-three million, two hundred twenty thousand, seven hundred twenty-three".