521140005 has 96 divisors (see below), whose sum is σ = 985944960. Its totient is φ = 254016000.

The previous prime is 521139989. The next prime is 521140021. The reversal of 521140005 is 500041125.

521140005 is a `hidden beast` number, since 521 + 140 + 0 + 0 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (521139989) and next prime (521140021).

It is not a de Polignac number, because 521140005 - 2⁴ = 521139989 is a prime.

It is a super-2 number, since 2×521140005² = 543173809622800050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 521140005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2076130 + ... + 2076380.

It is an arithmetic number, because the mean of its divisors is an integer number (10270260).

Almost surely, 2^521140005 is an apocalyptic number.

It is an amenable number.

521140005 is a deficient number, since it is larger than the sum of its proper divisors (464804955).

521140005 is a wasteful number, since it uses less digits than its factorization.

521140005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 521140005 is about 22828.4910802269. The cubic root of 521140005 is about 804.7323699151.

The spelling of 521140005 in words is "five hundred twenty-one million, one hundred forty thousand, five".