145216199 has 4 divisors (see below), whose sum is σ = 147205536. Its totient is φ = 143226864.

The previous prime is 145216177. The next prime is 145216241. The reversal of 145216199 is 991612541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991612541 = 11393 ⋅87037.

It is a cyclic number.

It is not a de Polignac number, because 145216199 - 2⁸ = 145215943 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 (145216129) 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, 994559 + ... + 994704.

It is an arithmetic number, because the mean of its divisors is an integer number (36801384).

Almost surely, 2^145216199 is an apocalyptic number.

145216199 is a deficient number, since it is larger than the sum of its proper divisors (1989337).

145216199 is an equidigital number, since it uses as much as digits as its factorization.

145216199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989336.

The product of its digits is 19440, while the sum is 38.

The square root of 145216199 is about 12050.5684098303. The cubic root of 145216199 is about 525.6197657317.

The spelling of 145216199 in words is "one hundred forty-five million, two hundred sixteen thousand, one hundred ninety-nine".