133143912 has 80 divisors (see below), whose sum is σ = 406850400. Its totient is φ = 40344480.

The previous prime is 133143893. The next prime is 133143931. The reversal of 133143912 is 219341331.

It is an interprime number because it is at equal distance from previous prime (133143893) and next prime (133143931).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2212 + ... + 16467.

It is an arithmetic number, because the mean of its divisors is an integer number (5085630).

Almost surely, 2^133143912 is an apocalyptic number.

133143912 is a gapful number since it is divisible by the number (12) 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 133143912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203425200).

133143912 is an abundant number, since it is smaller than the sum of its proper divisors (273706488).

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

133143912 is a wasteful number, since it uses less digits than its factorization.

133143912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18708 (or 18695 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 133143912 is about 11538.8002842583. The cubic root of 133143912 is about 510.6309146831.

The spelling of 133143912 in words is "one hundred thirty-three million, one hundred forty-three thousand, nine hundred twelve".