551857387 has 2 divisors, whose sum is σ = 551857388. Its totient is φ = 551857386.

The previous prime is 551857373. The next prime is 551857391. The reversal of 551857387 is 783758155.

551857387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551857387 - 2⁷ = 551857259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551857387.

It is not a weakly prime, because it can be changed into another prime (551857307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275928693 + 275928694.

It is an arithmetic number, because the mean of its divisors is an integer number (275928694).

Almost surely, 2^551857387 is an apocalyptic number.

551857387 is a deficient number, since it is larger than the sum of its proper divisors (1).

551857387 is an equidigital number, since it uses as much as digits as its factorization.

551857387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176000, while the sum is 49.

The square root of 551857387 is about 23491.6450466969. The cubic root of 551857387 is about 820.2425353362.

The spelling of 551857387 in words is "five hundred fifty-one million, eight hundred fifty-seven thousand, three hundred eighty-seven".