53220231 has 12 divisors (see below), whose sum is σ = 77580360. Its totient is φ = 35154000.

The previous prime is 53220199. The next prime is 53220241. The reversal of 53220231 is 13202235.

It is not a de Polignac number, because 53220231 - 2⁵ = 53220199 is a prime.

It is a super-2 number, since 2×53220231² = 5664785975386722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53220241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26145 + ... + 28106.

It is an arithmetic number, because the mean of its divisors is an integer number (6465030).

Almost surely, 2^53220231 is an apocalyptic number.

53220231 is a deficient number, since it is larger than the sum of its proper divisors (24360129).

53220231 is a wasteful number, since it uses less digits than its factorization.

53220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54366 (or 54363 counting only the distinct ones).

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

The square root of 53220231 is about 7295.2197362382. The cubic root of 53220231 is about 376.1481398124.

Adding to 53220231 its reverse (13202235), we get a palindrome (66422466).

The spelling of 53220231 in words is "fifty-three million, two hundred twenty thousand, two hundred thirty-one".