53217231 has 8 divisors (see below), whose sum is σ = 71024304. Its totient is φ = 35444160.

The previous prime is 53217223. The next prime is 53217251. The reversal of 53217231 is 13271235.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53217231 - 2³ = 53217223 is a prime.

It is a super-2 number, since 2×53217231² = 5664147350614722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53217251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4590 + ... + 11291.

It is an arithmetic number, because the mean of its divisors is an integer number (8878038).

Almost surely, 2^53217231 is an apocalyptic number.

53217231 is a deficient number, since it is larger than the sum of its proper divisors (17807073).

53217231 is a wasteful number, since it uses less digits than its factorization.

53217231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17001.

The product of its digits is 1260, while the sum is 24.

The square root of 53217231 is about 7295.0141192461. The cubic root of 53217231 is about 376.1410719135.

Adding to 53217231 its reverse (13271235), we get a palindrome (66488466).

The spelling of 53217231 in words is "fifty-three million, two hundred seventeen thousand, two hundred thirty-one".