191425133 has 4 divisors (see below), whose sum is σ = 201500160. Its totient is φ = 181350108.

The previous prime is 191425103. The next prime is 191425139. The reversal of 191425133 is 331524191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331524191 = 17 ⋅19501423.

It is a cyclic number.

It is not a de Polignac number, because 191425133 - 2²² = 187230829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191425096 and 191425105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191425139) 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, 5037485 + ... + 5037522.

It is an arithmetic number, because the mean of its divisors is an integer number (50375040).

Almost surely, 2^191425133 is an apocalyptic number.

It is an amenable number.

191425133 is a deficient number, since it is larger than the sum of its proper divisors (10075027).

191425133 is a wasteful number, since it uses less digits than its factorization.

191425133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075026.

The product of its digits is 3240, while the sum is 29.

The square root of 191425133 is about 13835.6471839954. The cubic root of 191425133 is about 576.3234874745.

The spelling of 191425133 in words is "one hundred ninety-one million, four hundred twenty-five thousand, one hundred thirty-three".