198131045 has 16 divisors (see below), whose sum is σ = 281093760. Its totient is φ = 131175744.

The previous prime is 198131033. The next prime is 198131051. The reversal of 198131045 is 540131891.

It is not a de Polignac number, because 198131045 - 2⁶ = 198130981 is a prime.

It is a super-3 number, since 3×198131045³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96587 + ... + 98616.

It is an arithmetic number, because the mean of its divisors is an integer number (17568360).

Almost surely, 2^198131045 is an apocalyptic number.

It is an amenable number.

198131045 is a deficient number, since it is larger than the sum of its proper divisors (82962715).

198131045 is a wasteful number, since it uses less digits than its factorization.

198131045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195244.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 198131045 is about 14075.9029905722. The cubic root of 198131045 is about 582.9762246021.

The spelling of 198131045 in words is "one hundred ninety-eight million, one hundred thirty-one thousand, forty-five".