530551921 has 2 divisors, whose sum is σ = 530551922. Its totient is φ = 530551920.

The previous prime is 530551871. The next prime is 530551981. The reversal of 530551921 is 129155035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428945521 + 101606400 = 20711^2 + 10080^2 .

It is a cyclic number.

It is not a de Polignac number, because 530551921 - 2¹³ = 530543729 is a prime.

It is not a weakly prime, because it can be changed into another prime (530551981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265275960 + 265275961.

It is an arithmetic number, because the mean of its divisors is an integer number (265275961).

Almost surely, 2^530551921 is an apocalyptic number.

It is an amenable number.

530551921 is a deficient number, since it is larger than the sum of its proper divisors (1).

530551921 is an equidigital number, since it uses as much as digits as its factorization.

530551921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 530551921 is about 23033.7127055106. The cubic root of 530551921 is about 809.5480489464.

The spelling of 530551921 in words is "five hundred thirty million, five hundred fifty-one thousand, nine hundred twenty-one".