199972253 has 4 divisors (see below), whose sum is σ = 215354748. Its totient is φ = 184589760.

The previous prime is 199972249. The next prime is 199972259. The reversal of 199972253 is 352279991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352279991 = 7 ⋅50325713.

It can be written as a sum of positive squares in 2 ways, for example, as 111555844 + 88416409 = 10562^2 + 9403^2 .

It is a cyclic number.

It is not a de Polignac number, because 199972253 - 2² = 199972249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199972198 and 199972207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199972259) 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, 7691228 + ... + 7691253.

It is an arithmetic number, because the mean of its divisors is an integer number (53838687).

Almost surely, 2^199972253 is an apocalyptic number.

199972253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

199972253 is a deficient number, since it is larger than the sum of its proper divisors (15382495).

199972253 is a wasteful number, since it uses less digits than its factorization.

199972253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15382494.

The product of its digits is 306180, while the sum is 47.

The square root of 199972253 is about 14141.1545851108. The cubic root of 199972253 is about 584.7765021518.

The spelling of 199972253 in words is "one hundred ninety-nine million, nine hundred seventy-two thousand, two hundred fifty-three".