531224121 has 4 divisors (see below), whose sum is σ = 708298832. Its totient is φ = 354149412.

The previous prime is 531224081. The next prime is 531224131. The reversal of 531224121 is 121422135.

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 not a de Polignac number, because 531224121 - 2¹³ = 531215929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531224131) 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, 88537351 + ... + 88537356.

It is an arithmetic number, because the mean of its divisors is an integer number (177074708).

Almost surely, 2^531224121 is an apocalyptic number.

It is an amenable number.

531224121 is a deficient number, since it is larger than the sum of its proper divisors (177074711).

531224121 is a wasteful number, since it uses less digits than its factorization.

531224121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177074710.

The product of its digits is 480, while the sum is 21.

The square root of 531224121 is about 23048.2997420634. The cubic root of 531224121 is about 809.8897990605.

Adding to 531224121 its reverse (121422135), we get a palindrome (652646256).

The spelling of 531224121 in words is "five hundred thirty-one million, two hundred twenty-four thousand, one hundred twenty-one".