511430401 has 4 divisors (see below), whose sum is σ = 517176900. Its totient is φ = 505683904.

The previous prime is 511430389. The next prime is 511430411. The reversal of 511430401 is 104034115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104034115 = 5 ⋅20806823.

It can be written as a sum of positive squares in 2 ways, for example, as 155127025 + 356303376 = 12455^2 + 18876^2 .

It is a cyclic number.

It is not a de Polignac number, because 511430401 - 2²⁵ = 477875969 is a prime.

It is a super-2 number, since 2×511430401² = 523122110134041602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511430411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2873116 + ... + 2873293.

It is an arithmetic number, because the mean of its divisors is an integer number (129294225).

Almost surely, 2^511430401 is an apocalyptic number.

It is an amenable number.

511430401 is a deficient number, since it is larger than the sum of its proper divisors (5746499).

511430401 is an equidigital number, since it uses as much as digits as its factorization.

511430401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5746498.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 511430401 is about 22614.8270168047. The cubic root of 511430401 is about 799.7032237726.

Adding to 511430401 its reverse (104034115), we get a palindrome (615464516).

The spelling of 511430401 in words is "five hundred eleven million, four hundred thirty thousand, four hundred one".