1231000233 has 4 divisors (see below), whose sum is σ = 1641333648. Its totient is φ = 820666820.

The previous prime is 1231000231. The next prime is 1231000237. The reversal of 1231000233 is 3320001321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231000233 - 2¹ = 1231000231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231000231) 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, 205166703 + ... + 205166708.

It is an arithmetic number, because the mean of its divisors is an integer number (410333412).

Almost surely, 2^1231000233 is an apocalyptic number.

It is an amenable number.

1231000233 is a deficient number, since it is larger than the sum of its proper divisors (410333415).

1231000233 is an equidigital number, since it uses as much as digits as its factorization.

1231000233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410333414.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1231000233 is about 35085.6129061472. The cubic root of 1231000233 is about 1071.7316221428.

Adding to 1231000233 its reverse (3320001321), we get a palindrome (4551001554).

The spelling of 1231000233 in words is "one billion, two hundred thirty-one million, two hundred thirty-three", and thus it is an aban number.