531622161 has 24 divisors (see below), whose sum is σ = 915757440. Its totient is φ = 290575296.

The previous prime is 531622139. The next prime is 531622183. The reversal of 531622161 is 161226135.

531622161 is a `hidden beast` number, since 5 + 31 + 622 + 1 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (531622139) and next prime (531622183).

It is not a de Polignac number, because 531622161 - 2¹⁴ = 531605777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (531622111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181996 + ... + 184893.

It is an arithmetic number, because the mean of its divisors is an integer number (38156560).

Almost surely, 2^531622161 is an apocalyptic number.

It is an amenable number.

531622161 is a deficient number, since it is larger than the sum of its proper divisors (384135279).

531622161 is a wasteful number, since it uses less digits than its factorization.

531622161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366925 (or 366922 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 531622161 is about 23056.9330354234. The cubic root of 531622161 is about 810.0920288669.

Adding to 531622161 its reverse (161226135), we get a palindrome (692848296).

The spelling of 531622161 in words is "five hundred thirty-one million, six hundred twenty-two thousand, one hundred sixty-one".