531450421 has 4 divisors (see below), whose sum is σ = 531528172. Its totient is φ = 531372672.

The previous prime is 531450419. The next prime is 531450427. The reversal of 531450421 is 124054135.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 303108100 + 228342321 = 17410^2 + 15111^2 .

It is a cyclic number.

It is not a de Polignac number, because 531450421 - 2¹ = 531450419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531450427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27516 + ... + 42661.

It is an arithmetic number, because the mean of its divisors is an integer number (132882043).

Almost surely, 2^531450421 is an apocalyptic number.

It is an amenable number.

531450421 is a deficient number, since it is larger than the sum of its proper divisors (77751).

531450421 is an equidigital number, since it uses as much as digits as its factorization.

531450421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77750.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 531450421 is about 23053.2084751776. The cubic root of 531450421 is about 810.0047863356.

The spelling of 531450421 in words is "five hundred thirty-one million, four hundred fifty thousand, four hundred twenty-one".