1023133231 has 4 divisors (see below), whose sum is σ = 1034629200. Its totient is φ = 1011637264.

The previous prime is 1023133211. The next prime is 1023133259. The reversal of 1023133231 is 1323313201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1023133231 - 2⁷ = 1023133103 is a prime.

It is a super-3 number, since 3×1023133231³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023133199 and 1023133208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023133201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5747851 + ... + 5748028.

It is an arithmetic number, because the mean of its divisors is an integer number (258657300).

Almost surely, 2^1023133231 is an apocalyptic number.

1023133231 is a deficient number, since it is larger than the sum of its proper divisors (11495969).

1023133231 is an equidigital number, since it uses as much as digits as its factorization.

1023133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495968.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1023133231 is about 31986.4538672232. The cubic root of 1023133231 is about 1007.6523688795.

Adding to 1023133231 its reverse (1323313201), we get a palindrome (2346446432).

The spelling of 1023133231 in words is "one billion, twenty-three million, one hundred thirty-three thousand, two hundred thirty-one".