199525990 has 16 divisors (see below), whose sum is σ = 359755200. Its totient is φ = 79675200.

The previous prime is 199525981. The next prime is 199525999. The reversal of 199525990 is 99525991.

It is a happy number.

199525990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199525981) and next prime (199525999).

It is a super-3 number, since 3×199525990³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199525999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10590 + ... + 22609.

It is an arithmetic number, because the mean of its divisors is an integer number (22484700).

Almost surely, 2^199525990 is an apocalyptic number.

199525990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199525990 is a deficient number, since it is larger than the sum of its proper divisors (160229210).

199525990 is a wasteful number, since it uses less digits than its factorization.

199525990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33807.

The product of its (nonzero) digits is 328050, while the sum is 49.

The square root of 199525990 is about 14125.3668978898. The cubic root of 199525990 is about 584.3411776206.

Subtracting from 199525990 its reverse (99525991), we obtain a palindrome (99999999).

The spelling of 199525990 in words is "one hundred ninety-nine million, five hundred twenty-five thousand, nine hundred ninety".