199248550901 has 4 divisors (see below), whose sum is σ = 199255259532. Its totient is φ = 199241842272.

The previous prime is 199248550889. The next prime is 199248550909. The reversal of 199248550901 is 109055842991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109055842991 = 5051 ⋅21590941.

It can be written as a sum of positive squares in 2 ways, for example, as 154410488401 + 44838062500 = 392951^2 + 211750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199248550901 is a prime.

It is a super-2 number, since 2×199248550901² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199248550909) 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, 3309566 + ... + 3369231.

It is an arithmetic number, because the mean of its divisors is an integer number (49813814883).

Almost surely, 2^199248550901 is an apocalyptic number.

It is an amenable number.

199248550901 is a deficient number, since it is larger than the sum of its proper divisors (6708631).

199248550901 is an equidigital number, since it uses as much as digits as its factorization.

199248550901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6708630.

The product of its (nonzero) digits is 1166400, while the sum is 53.

The spelling of 199248550901 in words is "one hundred ninety-nine billion, two hundred forty-eight million, five hundred fifty thousand, nine hundred one".