551840057 has 4 divisors (see below), whose sum is σ = 552575616. Its totient is φ = 551104500.

The previous prime is 551840053. The next prime is 551840059. The reversal of 551840057 is 750048155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 551840057 - 2² = 551840053 is a prime.

It is a super-3 number, since 3×551840057³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551839999 and 551840026.

It is not an unprimeable number, because it can be changed into a prime (551840053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366653 + ... + 368154.

It is an arithmetic number, because the mean of its divisors is an integer number (138143904).

Almost surely, 2^551840057 is an apocalyptic number.

It is an amenable number.

551840057 is a deficient number, since it is larger than the sum of its proper divisors (735559).

551840057 is an equidigital number, since it uses as much as digits as its factorization.

551840057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735558.

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 551840057 is about 23491.2761892580. The cubic root of 551840057 is about 820.2339492097.

The spelling of 551840057 in words is "five hundred fifty-one million, eight hundred forty thousand, fifty-seven".