133231000 has 96 divisors (see below), whose sum is σ = 362793600. Its totient is φ = 45662400.

The previous prime is 133230991. The next prime is 133231009. The reversal of 133231000 is 132331.

It is an interprime number because it is at equal distance from previous prime (133230991) and next prime (133231009).

It is a super-2 number, since 2×133231000² = 35500998722000000, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133231009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47641 + ... + 50359.

It is an arithmetic number, because the mean of its divisors is an integer number (3779100).

Almost surely, 2^133231000 is an apocalyptic number.

133231000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181396800).

133231000 is an abundant number, since it is smaller than the sum of its proper divisors (229562600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133231000 is a wasteful number, since it uses less digits than its factorization.

133231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754 (or 2733 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 133231000 is about 11542.5733699206. The cubic root of 133231000 is about 510.7422231468.

Adding to 133231000 its reverse (132331), we get a palindrome (133363331).

The spelling of 133231000 in words is "one hundred thirty-three million, two hundred thirty-one thousand".