133403250 has 64 divisors (see below), whose sum is σ = 352594944. Its totient is φ = 33478400.

The previous prime is 133403201. The next prime is 133403251. The reversal of 133403250 is 52304331.

It is a super-2 number, since 2×133403250² = 35592854221125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133403251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7519 + ... + 17981.

It is an arithmetic number, because the mean of its divisors is an integer number (5509296).

Almost surely, 2^133403250 is an apocalyptic number.

133403250 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 133403250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176297472).

133403250 is an abundant number, since it is smaller than the sum of its proper divisors (219191694).

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

133403250 is a wasteful number, since it uses less digits than its factorization.

133403250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500 (or 10490 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 133403250 is about 11550.0324674868. The cubic root of 133403250 is about 510.9622356606.

Adding to 133403250 its reverse (52304331), we get a palindrome (185707581).

The spelling of 133403250 in words is "one hundred thirty-three million, four hundred three thousand, two hundred fifty".