133144572 has 48 divisors (see below), whose sum is σ = 340752384. Its totient is φ = 40128000.

The previous prime is 133144567. The next prime is 133144577. The reversal of 133144572 is 275441331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (133144567) and next prime (133144577).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133144577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22572 + ... + 27852.

It is an arithmetic number, because the mean of its divisors is an integer number (7099008).

Almost surely, 2^133144572 is an apocalyptic number.

133144572 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 133144572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170376192).

133144572 is an abundant number, since it is smaller than the sum of its proper divisors (207607812).

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

133144572 is a wasteful number, since it uses less digits than its factorization.

133144572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5490 (or 5488 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 133144572 is about 11538.8288833833. The cubic root of 133144572 is about 510.6317584214.

The spelling of 133144572 in words is "one hundred thirty-three million, one hundred forty-four thousand, five hundred seventy-two".