133045251 has 4 divisors (see below), whose sum is σ = 177393672. Its totient is φ = 88696832.

The previous prime is 133045223. The next prime is 133045261. The reversal of 133045251 is 152540331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152540331 = 3 ⋅50846777.

It is a cyclic number.

It is not a de Polignac number, because 133045251 - 2⁵ = 133045219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133045261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22174206 + ... + 22174211.

It is an arithmetic number, because the mean of its divisors is an integer number (44348418).

Almost surely, 2^133045251 is an apocalyptic number.

133045251 is a deficient number, since it is larger than the sum of its proper divisors (44348421).

133045251 is an equidigital number, since it uses as much as digits as its factorization.

133045251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44348420.

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

The square root of 133045251 is about 11534.5243074866. The cubic root of 133045251 is about 510.5047559403.

Adding to 133045251 its reverse (152540331), we get a palindrome (285585582).

The spelling of 133045251 in words is "one hundred thirty-three million, forty-five thousand, two hundred fifty-one".