52722231 has 4 divisors (see below), whose sum is σ = 70296312. Its totient is φ = 35148152.

The previous prime is 52722193. The next prime is 52722259. The reversal of 52722231 is 13222725.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 52722231 - 2⁶ = 52722167 is a prime.

It is a super-2 number, since 2×52722231² = 5559267283234722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52722281) 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, 8787036 + ... + 8787041.

It is an arithmetic number, because the mean of its divisors is an integer number (17574078).

Almost surely, 2^52722231 is an apocalyptic number.

52722231 is a deficient number, since it is larger than the sum of its proper divisors (17574081).

52722231 is a wasteful number, since it uses less digits than its factorization.

52722231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17574080.

The product of its digits is 1680, while the sum is 24.

The square root of 52722231 is about 7261.0075747103. The cubic root of 52722231 is about 374.9712120123.

Adding to 52722231 its reverse (13222725), we get a palindrome (65944956).

It can be divided in two parts, 5272 and 2231, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 52722231 in words is "fifty-two million, seven hundred twenty-two thousand, two hundred thirty-one".