133894251 has 6 divisors (see below), whose sum is σ = 193402820. Its totient is φ = 89262828.

The previous prime is 133894213. The next prime is 133894259. The reversal of 133894251 is 152498331.

It is not a de Polignac number, because 133894251 - 2¹⁴ = 133877867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133894259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7438561 + ... + 7438578.

Almost surely, 2^133894251 is an apocalyptic number.

133894251 is a deficient number, since it is larger than the sum of its proper divisors (59508569).

133894251 is a wasteful number, since it uses less digits than its factorization.

133894251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14877145 (or 14877142 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 133894251 is about 11571.2683401605. The cubic root of 133894251 is about 511.5883468396.

Subtracting from 133894251 its product of digits (25920), we obtain a palindrome (133868331).

The spelling of 133894251 in words is "one hundred thirty-three million, eight hundred ninety-four thousand, two hundred fifty-one".