531120451 has 2 divisors, whose sum is σ = 531120452. Its totient is φ = 531120450.

The previous prime is 531120449. The next prime is 531120461. The reversal of 531120451 is 154021135.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531120451 - 2¹ = 531120449 is a prime.

Together with 531120449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (531120431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265560225 + 265560226.

It is an arithmetic number, because the mean of its divisors is an integer number (265560226).

Almost surely, 2^531120451 is an apocalyptic number.

531120451 is a deficient number, since it is larger than the sum of its proper divisors (1).

531120451 is an equidigital number, since it uses as much as digits as its factorization.

531120451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 531120451 is about 23046.0506594948. The cubic root of 531120451 is about 809.8371114820.

Adding to 531120451 its reverse (154021135), we get a palindrome (685141586).

The spelling of 531120451 in words is "five hundred thirty-one million, one hundred twenty thousand, four hundred fifty-one".