551540505 has 8 divisors (see below), whose sum is σ = 882464832. Its totient is φ = 294154928.

The previous prime is 551540501. The next prime is 551540527. The reversal of 551540505 is 505045155.

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

It is a cyclic number.

It is not a de Polignac number, because 551540505 - 2² = 551540501 is a prime.

It is a super-3 number, since 3×551540505³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551540501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18384669 + ... + 18384698.

It is an arithmetic number, because the mean of its divisors is an integer number (110308104).

Almost surely, 2^551540505 is an apocalyptic number.

It is an amenable number.

551540505 is a deficient number, since it is larger than the sum of its proper divisors (330924327).

551540505 is a wasteful number, since it uses less digits than its factorization.

551540505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36769375.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 551540505 is about 23484.8995101107. The cubic root of 551540505 is about 820.0855081364.

The spelling of 551540505 in words is "five hundred fifty-one million, five hundred forty thousand, five hundred five".