551404405 has 32 divisors (see below), whose sum is σ = 701537760. Its totient is φ = 415457280.

The previous prime is 551404391. The next prime is 551404417. The reversal of 551404405 is 504404155.

It can be written as a sum of positive squares in 16 ways, for example, as 303247396 + 248157009 = 17414^2 + 15753^2 .

It is not a de Polignac number, because 551404405 - 2⁹ = 551403893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1195875 + ... + 1196335.

It is an arithmetic number, because the mean of its divisors is an integer number (21923055).

Almost surely, 2^551404405 is an apocalyptic number.

It is an amenable number.

551404405 is a deficient number, since it is larger than the sum of its proper divisors (150133355).

551404405 is a wasteful number, since it uses less digits than its factorization.

551404405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 551404405 is about 23482.0017247253. The cubic root of 551404405 is about 820.0180468961.

The spelling of 551404405 in words is "five hundred fifty-one million, four hundred four thousand, four hundred five".