551705387 has 8 divisors (see below), whose sum is σ = 556799040. Its totient is φ = 546634440.

The previous prime is 551705359. The next prime is 551705423. The reversal of 551705387 is 783507155.

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 551705387 - 2¹² = 551701291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551705587) 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, 45212 + ... + 56102.

It is an arithmetic number, because the mean of its divisors is an integer number (69599880).

Almost surely, 2^551705387 is an apocalyptic number.

551705387 is a deficient number, since it is larger than the sum of its proper divisors (5093653).

551705387 is a wasteful number, since it uses less digits than its factorization.

551705387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11353.

The product of its (nonzero) digits is 147000, while the sum is 41.

The square root of 551705387 is about 23488.4096311351. The cubic root of 551705387 is about 820.1672210027.

The spelling of 551705387 in words is "five hundred fifty-one million, seven hundred five thousand, three hundred eighty-seven".