551240409 has 8 divisors (see below), whose sum is σ = 739496992. Its totient is φ = 365238720.

The previous prime is 551240401. The next prime is 551240429. The reversal of 551240409 is 904042155.

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

It is not a de Polignac number, because 551240409 - 2³ = 551240401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551240401) 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, 563152 + ... + 564129.

It is an arithmetic number, because the mean of its divisors is an integer number (92437124).

Almost surely, 2^551240409 is an apocalyptic number.

It is an amenable number.

551240409 is a deficient number, since it is larger than the sum of its proper divisors (188256583).

551240409 is a wasteful number, since it uses less digits than its factorization.

551240409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127447.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 551240409 is about 23478.5095140215. The cubic root of 551240409 is about 819.9367435836.

The spelling of 551240409 in words is "five hundred fifty-one million, two hundred forty thousand, four hundred nine".