531445001 has 2 divisors, whose sum is σ = 531445002. Its totient is φ = 531445000.

The previous prime is 531444971. The next prime is 531445003. The reversal of 531445001 is 100544135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416976400 + 114468601 = 20420^2 + 10699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531445001 is a prime.

Together with 531445003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531445003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265722500 + 265722501.

It is an arithmetic number, because the mean of its divisors is an integer number (265722501).

Almost surely, 2^531445001 is an apocalyptic number.

It is an amenable number.

531445001 is a deficient number, since it is larger than the sum of its proper divisors (1).

531445001 is an equidigital number, since it uses as much as digits as its factorization.

531445001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 531445001 is about 23053.0909207421. The cubic root of 531445001 is about 810.0020327135.

Adding to 531445001 its reverse (100544135), we get a palindrome (631989136).

The spelling of 531445001 in words is "five hundred thirty-one million, four hundred forty-five thousand, one".