231002020133 has 8 divisors (see below), whose sum is σ = 236782265496. Its totient is φ = 225228729600.

The previous prime is 231002020103. The next prime is 231002020211. The reversal of 231002020133 is 331020200132.

It can be written as a sum of positive squares in 4 ways, for example, as 2577288289 + 228424731844 = 50767^2 + 477938^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231002020133 - 2⁸ = 231002019877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231002020103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1671416 + ... + 1804337.

It is an arithmetic number, because the mean of its divisors is an integer number (29597783187).

Almost surely, 2^231002020133 is an apocalyptic number.

It is an amenable number.

231002020133 is a deficient number, since it is larger than the sum of its proper divisors (5780245363).

231002020133 is a wasteful number, since it uses less digits than its factorization.

231002020133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477415.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 231002020133 its reverse (331020200132), we get a palindrome (562022220265).

The spelling of 231002020133 in words is "two hundred thirty-one billion, two million, twenty thousand, one hundred thirty-three".