551220199 has 4 divisors (see below), whose sum is σ = 551781936. Its totient is φ = 550658464.

The previous prime is 551220169. The next prime is 551220211. The reversal of 551220199 is 991022155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991022155 = 5 ⋅198204431.

It is a cyclic number.

It is not a de Polignac number, because 551220199 - 2⁵ = 551220167 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 (551220169) 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, 279394 + ... + 281359.

It is an arithmetic number, because the mean of its divisors is an integer number (137945484).

Almost surely, 2^551220199 is an apocalyptic number.

551220199 is a deficient number, since it is larger than the sum of its proper divisors (561737).

551220199 is an equidigital number, since it uses as much as digits as its factorization.

551220199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561736.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 551220199 is about 23478.0791164865. The cubic root of 551220199 is about 819.9267230772.

The spelling of 551220199 in words is "five hundred fifty-one million, two hundred twenty thousand, one hundred ninety-nine".