511040465 has 16 divisors (see below), whose sum is σ = 683197200. Its totient is φ = 364369152.

The previous prime is 511040461. The next prime is 511040471. The reversal of 511040465 is 564040115.

It can be written as a sum of positive squares in 8 ways, for example, as 111999889 + 399040576 = 10583^2 + 19976^2 .

It is a cyclic number.

It is not a de Polignac number, because 511040465 - 2² = 511040461 is a prime.

It is a super-2 number, since 2×511040465² = 522324713734832450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511040461) 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 15 ways as a sum of consecutive naturals, for example, 133670 + ... + 137439.

It is an arithmetic number, because the mean of its divisors is an integer number (42699825).

Almost surely, 2^511040465 is an apocalyptic number.

It is an amenable number.

511040465 is a deficient number, since it is larger than the sum of its proper divisors (172156735).

511040465 is a wasteful number, since it uses less digits than its factorization.

511040465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271156.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 511040465 is about 22606.2041263013. The cubic root of 511040465 is about 799.4999296647.

The spelling of 511040465 in words is "five hundred eleven million, forty thousand, four hundred sixty-five".