231000302133 has 12 divisors (see below), whose sum is σ = 342685133388. Its totient is φ = 149838033600.

The previous prime is 231000302087. The next prime is 231000302147. The reversal of 231000302133 is 331203000132.

231000302133 is a `hidden beast` number, since 231 + 0 + 0 + 0 + 302 + 133 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 217247345604 + 13752956529 = 466098^2 + 117273^2 .

It is not a de Polignac number, because 231000302133 - 2¹³ = 231000293941 is a prime.

It is a super-2 number, since 2×231000302133² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231000302153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346846968 + ... + 346847633.

It is an arithmetic number, because the mean of its divisors is an integer number (28557094449).

Almost surely, 2^231000302133 is an apocalyptic number.

It is an amenable number.

231000302133 is a deficient number, since it is larger than the sum of its proper divisors (111684831255).

231000302133 is a wasteful number, since it uses less digits than its factorization.

231000302133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693694644 (or 693694641 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 231000302133 its reverse (331203000132), we get a palindrome (562203302265).

The spelling of 231000302133 in words is "two hundred thirty-one billion, three hundred two thousand, one hundred thirty-three".