551002401 has 12 divisors (see below), whose sum is σ = 821566720. Its totient is φ = 355485240.

The previous prime is 551002391. The next prime is 551002411. The reversal of 551002401 is 104200155.

It is an interprime number because it is at equal distance from previous prime (551002391) and next prime (551002411).

It is not a de Polignac number, because 551002401 - 2¹⁰ = 551001377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551002411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 987181 + ... + 987738.

Almost surely, 2^551002401 is an apocalyptic number.

It is an amenable number.

551002401 is a deficient number, since it is larger than the sum of its proper divisors (270564319).

551002401 is a wasteful number, since it uses less digits than its factorization.

551002401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974956 (or 1974953 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 551002401 is about 23473.4403315747. The cubic root of 551002401 is about 819.8187190975.

Adding to 551002401 its reverse (104200155), we get a palindrome (655202556).

The spelling of 551002401 in words is "five hundred fifty-one million, two thousand, four hundred one".