551115607 has 4 divisors (see below), whose sum is σ = 629846416. Its totient is φ = 472384800.

The previous prime is 551115533. The next prime is 551115647. The reversal of 551115607 is 706511155.

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

It is a cyclic number.

It is not a de Polignac number, because 551115607 - 2²³ = 542726999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551115647) 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, 39365394 + ... + 39365407.

It is an arithmetic number, because the mean of its divisors is an integer number (157461604).

Almost surely, 2^551115607 is an apocalyptic number.

551115607 is a deficient number, since it is larger than the sum of its proper divisors (78730809).

551115607 is an equidigital number, since it uses as much as digits as its factorization.

551115607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78730808.

The product of its (nonzero) digits is 5250, while the sum is 31.

The square root of 551115607 is about 23475.8515713488. The cubic root of 551115607 is about 819.8748604395.

The spelling of 551115607 in words is "five hundred fifty-one million, one hundred fifteen thousand, six hundred seven".