551243465 has 4 divisors (see below), whose sum is σ = 661492164. Its totient is φ = 440994768.

The previous prime is 551243449. The next prime is 551243467. The reversal of 551243465 is 564342155.

551243465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 335182864 + 216060601 = 18308^2 + 14699^2 .

It is a cyclic number.

It is not a de Polignac number, because 551243465 - 2⁴ = 551243449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551243467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55124342 + ... + 55124351.

It is an arithmetic number, because the mean of its divisors is an integer number (165373041).

Almost surely, 2^551243465 is an apocalyptic number.

It is an amenable number.

551243465 is a deficient number, since it is larger than the sum of its proper divisors (110248699).

551243465 is a wasteful number, since it uses less digits than its factorization.

551243465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110248698.

The product of its digits is 72000, while the sum is 35.

The square root of 551243465 is about 23478.5745947236. The cubic root of 551243465 is about 819.9382587858.

The spelling of 551243465 in words is "five hundred fifty-one million, two hundred forty-three thousand, four hundred sixty-five".