231350133 has 32 divisors (see below), whose sum is σ = 358751232. Its totient is φ = 129888000.

The previous prime is 231350131. The next prime is 231350153. The reversal of 231350133 is 331053132.

It is not a de Polignac number, because 231350133 - 2¹ = 231350131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231350131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576733 + ... + 577133.

It is an arithmetic number, because the mean of its divisors is an integer number (11210976).

Almost surely, 2^231350133 is an apocalyptic number.

It is an amenable number.

231350133 is a deficient number, since it is larger than the sum of its proper divisors (127401099).

231350133 is a wasteful number, since it uses less digits than its factorization.

231350133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 231350133 is about 15210.1983221784. The cubic root of 231350133 is about 613.8890937343.

The spelling of 231350133 in words is "two hundred thirty-one million, three hundred fifty thousand, one hundred thirty-three".