521552003 has 16 divisors (see below), whose sum is σ = 602241024. Its totient is φ = 442428480.

The previous prime is 521551937. The next prime is 521552069. The reversal of 521552003 is 300255125.

It is an interprime number because it is at equal distance from previous prime (521551937) and next prime (521552069).

It is a cyclic number.

It is not a de Polignac number, because 521552003 - 2¹² = 521547907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521552003.

It is not an unprimeable number, because it can be changed into a prime (521522003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556151 + ... + 557087.

It is an arithmetic number, because the mean of its divisors is an integer number (37640064).

Almost surely, 2^521552003 is an apocalyptic number.

521552003 is a deficient number, since it is larger than the sum of its proper divisors (80689021).

521552003 is a wasteful number, since it uses less digits than its factorization.

521552003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 521552003 is about 22837.5130651304. The cubic root of 521552003 is about 804.9443799901.

The spelling of 521552003 in words is "five hundred twenty-one million, five hundred fifty-two thousand, three".