52220723 has 4 divisors (see below), whose sum is σ = 53105880. Its totient is φ = 51335568.

The previous prime is 52220717. The next prime is 52220731. The reversal of 52220723 is 32702225.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52220723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52220743) 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, 442490 + ... + 442607.

It is an arithmetic number, because the mean of its divisors is an integer number (13276470).

Almost surely, 2^52220723 is an apocalyptic number.

52220723 is a deficient number, since it is larger than the sum of its proper divisors (885157).

52220723 is an equidigital number, since it uses as much as digits as its factorization.

52220723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885156.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 52220723 is about 7226.3907312018. The cubic root of 52220723 is about 373.7784798751.

Adding to 52220723 its reverse (32702225), we get a palindrome (84922948).

The spelling of 52220723 in words is "fifty-two million, two hundred twenty thousand, seven hundred twenty-three".