511561001 has 16 divisors (see below), whose sum is σ = 601336320. Its totient is φ = 425995200.

The previous prime is 511560979. The next prime is 511561003. The reversal of 511561001 is 100165115.

It is a cyclic number.

It is not a de Polignac number, because 511561001 - 2⁶ = 511560937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511561003) 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, 268151 + ... + 270051.

It is an arithmetic number, because the mean of its divisors is an integer number (37583520).

Almost surely, 2^511561001 is an apocalyptic number.

It is an amenable number.

511561001 is a deficient number, since it is larger than the sum of its proper divisors (89775319).

511561001 is a wasteful number, since it uses less digits than its factorization.

511561001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 511561001 is about 22617.7143186486. The cubic root of 511561001 is about 799.7712893080.

The spelling of 511561001 in words is "five hundred eleven million, five hundred sixty-one thousand, one".