133213231765 has 8 divisors (see below), whose sum is σ = 161652012120. Its totient is φ = 105373162752.

The previous prime is 133213231763. The next prime is 133213231819. The reversal of 133213231765 is 567132312331.

It can be written as a sum of positive squares in 4 ways, for example, as 35022502449 + 98190729316 = 187143^2 + 313354^2 .

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 133213231765 - 2¹ = 133213231763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133213231763) 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, 149677344 + ... + 149678233.

It is an arithmetic number, because the mean of its divisors is an integer number (20206501515).

Almost surely, 2^133213231765 is an apocalyptic number.

It is an amenable number.

133213231765 is a deficient number, since it is larger than the sum of its proper divisors (28438780355).

133213231765 is an equidigital number, since it uses as much as digits as its factorization.

133213231765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299355671.

The product of its digits is 68040, while the sum is 37.

The spelling of 133213231765 in words is "one hundred thirty-three billion, two hundred thirteen million, two hundred thirty-one thousand, seven hundred sixty-five".