551005401 has 8 divisors (see below), whose sum is σ = 741807040. Its totient is φ = 363770352.

The previous prime is 551005349. The next prime is 551005409. The reversal of 551005401 is 104500155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 551005401 - 2⁶ = 551005337 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 (551005409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891286 + ... + 891903.

It is an arithmetic number, because the mean of its divisors is an integer number (92725880).

Almost surely, 2^551005401 is an apocalyptic number.

It is an amenable number.

551005401 is a deficient number, since it is larger than the sum of its proper divisors (190801639).

551005401 is a wasteful number, since it uses less digits than its factorization.

551005401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783295.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 551005401 is about 23473.5042334970. The cubic root of 551005401 is about 819.8202069626.

Adding to 551005401 its reverse (104500155), we get a palindrome (655505556).

The spelling of 551005401 in words is "five hundred fifty-one million, five thousand, four hundred one".