531224261 has 4 divisors (see below), whose sum is σ = 554320992. Its totient is φ = 508127532.

The previous prime is 531224237. The next prime is 531224273. The reversal of 531224261 is 162422135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 531224261 - 2²⁶ = 464115397 is a prime.

It is a super-2 number, since 2×531224261² = 564398430949992242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531224261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531224861) 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, 11548331 + ... + 11548376.

It is an arithmetic number, because the mean of its divisors is an integer number (138580248).

Almost surely, 2^531224261 is an apocalyptic number.

It is an amenable number.

531224261 is a deficient number, since it is larger than the sum of its proper divisors (23096731).

531224261 is a wasteful number, since it uses less digits than its factorization.

531224261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23096730.

The product of its digits is 2880, while the sum is 26.

The square root of 531224261 is about 23048.3027791636. The cubic root of 531224261 is about 809.8898702072.

Adding to 531224261 its reverse (162422135), we get a palindrome (693646396).

The spelling of 531224261 in words is "five hundred thirty-one million, two hundred twenty-four thousand, two hundred sixty-one".