198273531 has 16 divisors (see below), whose sum is σ = 279104000. Its totient is φ = 124854048.

The previous prime is 198273527. The next prime is 198273587. The reversal of 198273531 is 135372891.

It is not a de Polignac number, because 198273531 - 2² = 198273527 is a prime.

It is a super-2 number, since 2×198273531² = 78624786190415922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198273531.

It is not an unprimeable number, because it can be changed into a prime (198273931) 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, 14910 + ... + 24876.

It is an arithmetic number, because the mean of its divisors is an integer number (17444000).

Almost surely, 2^198273531 is an apocalyptic number.

198273531 is a deficient number, since it is larger than the sum of its proper divisors (80830469).

198273531 is a wasteful number, since it uses less digits than its factorization.

198273531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10338.

The product of its digits is 45360, while the sum is 39.

The square root of 198273531 is about 14080.9634258455. The cubic root of 198273531 is about 583.1159402904.

The spelling of 198273531 in words is "one hundred ninety-eight million, two hundred seventy-three thousand, five hundred thirty-one".