551661115 has 8 divisors (see below), whose sum is σ = 666756720. Its totient is φ = 438153312.

The previous prime is 551661107. The next prime is 551661119. The reversal of 551661115 is 511166155.

551661115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 551661115 - 2³ = 551661107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551661119) 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, 396184 + ... + 397573.

It is an arithmetic number, because the mean of its divisors is an integer number (83344590).

Almost surely, 2^551661115 is an apocalyptic number.

551661115 is a deficient number, since it is larger than the sum of its proper divisors (115095605).

551661115 is a wasteful number, since it uses less digits than its factorization.

551661115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793901.

The product of its digits is 4500, while the sum is 31.

The square root of 551661115 is about 23487.4671899718. The cubic root of 551661115 is about 820.1452821108.

The spelling of 551661115 in words is "five hundred fifty-one million, six hundred sixty-one thousand, one hundred fifteen".