198553231 has 16 divisors (see below), whose sum is σ = 210165120. Its totient is φ = 187377120.

The previous prime is 198553193. The next prime is 198553237. The reversal of 198553231 is 132355891.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198553231 is a prime.

It is a super-2 number, since 2×198553231² = 78846771081078722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198553237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154116 + ... + 155398.

It is an arithmetic number, because the mean of its divisors is an integer number (13135320).

Almost surely, 2^198553231 is an apocalyptic number.

198553231 is a deficient number, since it is larger than the sum of its proper divisors (11611889).

198553231 is a wasteful number, since it uses less digits than its factorization.

198553231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446.

The product of its digits is 32400, while the sum is 37.

The square root of 198553231 is about 14090.8917744762. The cubic root of 198553231 is about 583.3900076274.

The spelling of 198553231 in words is "one hundred ninety-eight million, five hundred fifty-three thousand, two hundred thirty-one".