511695049 has 4 divisors (see below), whose sum is σ = 511760836. Its totient is φ = 511629264.

The previous prime is 511695043. The next prime is 511695073. The reversal of 511695049 is 940596115.

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 182925625 + 328769424 = 13525^2 + 18132^2 .

It is a cyclic number.

It is not a de Polignac number, because 511695049 - 2⁵ = 511695017 is a prime.

It is a super-2 number, since 2×511695049² = 523663646342224802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511695043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19374 + ... + 37399.

It is an arithmetic number, because the mean of its divisors is an integer number (127940209).

Almost surely, 2^511695049 is an apocalyptic number.

It is an amenable number.

511695049 is a deficient number, since it is larger than the sum of its proper divisors (65787).

511695049 is an equidigital number, since it uses as much as digits as its factorization.

511695049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65786.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 511695049 is about 22620.6774655402. The cubic root of 511695049 is about 799.8411398106.

The spelling of 511695049 in words is "five hundred eleven million, six hundred ninety-five thousand, forty-nine".