133212251 has 12 divisors (see below), whose sum is σ = 139820520. Its totient is φ = 126904800.

The previous prime is 133212229. The next prime is 133212271. The reversal of 133212251 is 152212331.

It is not a de Polignac number, because 133212251 - 2¹⁸ = 132950107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133212271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221351 + ... + 221951.

It is an arithmetic number, because the mean of its divisors is an integer number (11651710).

Almost surely, 2^133212251 is an apocalyptic number.

133212251 is a deficient number, since it is larger than the sum of its proper divisors (6608269).

133212251 is an equidigital number, since it uses as much as digits as its factorization.

133212251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1043 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 133212251 is about 11541.7611741016. The cubic root of 133212251 is about 510.7182638701.

Adding to 133212251 its reverse (152212331), we get a palindrome (285424582).

The spelling of 133212251 in words is "one hundred thirty-three million, two hundred twelve thousand, two hundred fifty-one".