249543133 has 30 divisors (see below), whose sum is σ = 304731994. Its totient is φ = 204186528.

The previous prime is 249543109. The next prime is 249543137. The reversal of 249543133 is 331345942.

It can be written as a sum of positive squares in 3 ways, for example, as 140612164 + 108930969 = 11858^2 + 10437^2 .

It is not a de Polignac number, because 249543133 - 2⁵ = 249543101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249543137) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4708335 + ... + 4708387.

Almost surely, 2^249543133 is an apocalyptic number.

It is an amenable number.

249543133 is a deficient number, since it is larger than the sum of its proper divisors (55188861).

249543133 is an frugal number, since it uses more digits than its factorization.

249543133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 97 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 249543133 is about 15796.9342911845. The cubic root of 249543133 is about 629.5765467162.

The spelling of 249543133 in words is "two hundred forty-nine million, five hundred forty-three thousand, one hundred thirty-three".