551125999 has 2 divisors, whose sum is σ = 551126000. Its totient is φ = 551125998.

The previous prime is 551125997. The next prime is 551126047. The reversal of 551125999 is 999521155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551125999 - 2¹ = 551125997 is a prime.

Together with 551125997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551125997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275562999 + 275563000.

It is an arithmetic number, because the mean of its divisors is an integer number (275563000).

Almost surely, 2^551125999 is an apocalyptic number.

551125999 is a deficient number, since it is larger than the sum of its proper divisors (1).

551125999 is an equidigital number, since it uses as much as digits as its factorization.

551125999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182250, while the sum is 46.

The square root of 551125999 is about 23476.0729041294. The cubic root of 551125999 is about 819.8800136753.

The spelling of 551125999 in words is "five hundred fifty-one million, one hundred twenty-five thousand, nine hundred ninety-nine".