551242405 has 12 divisors (see below), whose sum is σ = 769489740. Its totient is φ = 377994624.

The previous prime is 551242387. The next prime is 551242409. The reversal of 551242405 is 504242155.

It can be written as a sum of positive squares in 2 ways, for example, as 194825764 + 356416641 = 13958^2 + 18879^2 .

It is not a de Polignac number, because 551242405 - 2⁷ = 551242277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551242409) 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, 1124740 + ... + 1125229.

It is an arithmetic number, because the mean of its divisors is an integer number (64124145).

Almost surely, 2^551242405 is an apocalyptic number.

It is an amenable number.

551242405 is a deficient number, since it is larger than the sum of its proper divisors (218247335).

551242405 is a wasteful number, since it uses less digits than its factorization.

551242405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249988 (or 2249981 counting only the distinct ones).

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

The square root of 551242405 is about 23478.5520209403. The cubic root of 551242405 is about 819.9377332255.

The spelling of 551242405 in words is "five hundred fifty-one million, two hundred forty-two thousand, four hundred five".