199245157 has 4 divisors (see below), whose sum is σ = 201179680. Its totient is φ = 197310636.

The previous prime is 199245131. The next prime is 199245239. The reversal of 199245157 is 751542991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 199245157 - 2¹⁹ = 198720869 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 (199245107) 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, 967107 + ... + 967312.

It is an arithmetic number, because the mean of its divisors is an integer number (50294920).

Almost surely, 2^199245157 is an apocalyptic number.

It is an amenable number.

199245157 is a deficient number, since it is larger than the sum of its proper divisors (1934523).

199245157 is a wasteful number, since it uses less digits than its factorization.

199245157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934522.

The product of its digits is 113400, while the sum is 43.

The square root of 199245157 is about 14115.4226645893. The cubic root of 199245157 is about 584.0668953286.

The spelling of 199245157 in words is "one hundred ninety-nine million, two hundred forty-five thousand, one hundred fifty-seven".