511004401 has 4 divisors (see below), whose sum is σ = 512823204. Its totient is φ = 509185600.

The previous prime is 511004399. The next prime is 511004423. The reversal of 511004401 is 104400115.

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 425349376 + 85655025 = 20624^2 + 9255^2 .

It is a cyclic number.

It is not a de Polignac number, because 511004401 - 2¹ = 511004399 is a prime.

It is a super-2 number, since 2×511004401² = 522250995682737602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511004491) 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, 908980 + ... + 909541.

It is an arithmetic number, because the mean of its divisors is an integer number (128205801).

Almost surely, 2^511004401 is an apocalyptic number.

It is an amenable number.

511004401 is a deficient number, since it is larger than the sum of its proper divisors (1818803).

511004401 is a wasteful number, since it uses less digits than its factorization.

511004401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818802.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 511004401 is about 22605.4064550939. The cubic root of 511004401 is about 799.4811223845.

Adding to 511004401 its reverse (104400115), we get a palindrome (615404516).

The spelling of 511004401 in words is "five hundred eleven million, four thousand, four hundred one".