199540525 has 24 divisors (see below), whose sum is σ = 259894080. Its totient is φ = 151683840.

The previous prime is 199540513. The next prime is 199540531. The reversal of 199540525 is 525045991.

It is not a de Polignac number, because 199540525 - 2⁵ = 199540493 is a prime.

It is a super-2 number, since 2×199540525² = 79632842234551250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92661 + ... + 94789.

It is an arithmetic number, because the mean of its divisors is an integer number (10828920).

Almost surely, 2^199540525 is an apocalyptic number.

It is an amenable number.

199540525 is a deficient number, since it is larger than the sum of its proper divisors (60353555).

199540525 is a wasteful number, since it uses less digits than its factorization.

199540525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 199540525 is about 14125.8813884302. The cubic root of 199540525 is about 584.3553665704.

The spelling of 199540525 in words is "one hundred ninety-nine million, five hundred forty thousand, five hundred twenty-five".