531055421 has 4 divisors (see below), whose sum is σ = 571905852. Its totient is φ = 490204992.

The previous prime is 531055379. The next prime is 531055423. The reversal of 531055421 is 124550135.

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 192127321 + 338928100 = 13861^2 + 18410^2 .

It is a cyclic number.

It is not a de Polignac number, because 531055421 - 2²⁶ = 463946557 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 (531055423) 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, 20425196 + ... + 20425221.

It is an arithmetic number, because the mean of its divisors is an integer number (142976463).

Almost surely, 2^531055421 is an apocalyptic number.

It is an amenable number.

531055421 is a deficient number, since it is larger than the sum of its proper divisors (40850431).

531055421 is a wasteful number, since it uses less digits than its factorization.

531055421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40850430.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 531055421 is about 23044.6397455026. The cubic root of 531055421 is about 809.8040581782.

The spelling of 531055421 in words is "five hundred thirty-one million, fifty-five thousand, four hundred twenty-one".