53023221 has 32 divisors (see below), whose sum is σ = 83664000. Its totient is φ = 33073920.

The previous prime is 53023189. The next prime is 53023249. The reversal of 53023221 is 12232035.

53023221 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 53023221 - 2⁵ = 53023189 is a prime.

It is a super-2 number, since 2×53023221² = 5622923930429682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53023194 and 53023203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53023261) 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 31 ways as a sum of consecutive naturals, for example, 151755 + ... + 152103.

It is an arithmetic number, because the mean of its divisors is an integer number (2614500).

Almost surely, 2^53023221 is an apocalyptic number.

53023221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

53023221 is a deficient number, since it is larger than the sum of its proper divisors (30640779).

53023221 is a wasteful number, since it uses less digits than its factorization.

53023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 53023221 is about 7281.7045394605. The cubic root of 53023221 is about 375.6834257214.

Adding to 53023221 its reverse (12232035), we get a palindrome (65255256).

The spelling of 53023221 in words is "fifty-three million, twenty-three thousand, two hundred twenty-one".