133412550 has 48 divisors (see below), whose sum is σ = 335549952. Its totient is φ = 35072800.

The previous prime is 133412507. The next prime is 133412563. The reversal of 133412550 is 55214331.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133412550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4387 + ... + 16913.

It is an arithmetic number, because the mean of its divisors is an integer number (6990624).

Almost surely, 2^133412550 is an apocalyptic number.

133412550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133412550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167774976).

133412550 is an abundant number, since it is smaller than the sum of its proper divisors (202137402).

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

133412550 is a wasteful number, since it uses less digits than its factorization.

133412550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12613 (or 12608 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 133412550 is about 11550.4350567414. The cubic root of 133412550 is about 510.9741090304.

Adding to 133412550 its reverse (55214331), we get a palindrome (188626881).

The spelling of 133412550 in words is "one hundred thirty-three million, four hundred twelve thousand, five hundred fifty".