521050001 has 4 divisors (see below), whose sum is σ = 521658852. Its totient is φ = 520441152.

The previous prime is 521049961. The next prime is 521050003. The reversal of 521050001 is 100050125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 392000401 + 129049600 = 19799^2 + 11360^2 .

It is a cyclic number.

It is not a de Polignac number, because 521050001 - 2⁶ = 521049937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521050003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303140 + ... + 304853.

It is an arithmetic number, because the mean of its divisors is an integer number (130414713).

Almost surely, 2^521050001 is an apocalyptic number.

It is an amenable number.

521050001 is a deficient number, since it is larger than the sum of its proper divisors (608851).

521050001 is an equidigital number, since it uses as much as digits as its factorization.

521050001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608850.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 521050001 is about 22826.5196865400. The cubic root of 521050001 is about 804.6860398812.

The spelling of 521050001 in words is "five hundred twenty-one million, fifty thousand, one".