49792181 has 4 divisors (see below), whose sum is σ = 50249100. Its totient is φ = 49335264.

The previous prime is 49792177. The next prime is 49792243. The reversal of 49792181 is 18129794.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18129794 = 2 ⋅9064897.

It can be written as a sum of positive squares in 2 ways, for example, as 22648081 + 27144100 = 4759^2 + 5210^2 .

It is a cyclic number.

It is not a de Polignac number, because 49792181 - 2² = 49792177 is a prime.

It is a super-2 number, since 2×49792181² = 4958522577473522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49792111) 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, 228296 + ... + 228513.

It is an arithmetic number, because the mean of its divisors is an integer number (12562275).

Almost surely, 2^49792181 is an apocalyptic number.

It is an amenable number.

49792181 is a deficient number, since it is larger than the sum of its proper divisors (456919).

49792181 is a wasteful number, since it uses less digits than its factorization.

49792181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456918.

The product of its digits is 36288, while the sum is 41.

The square root of 49792181 is about 7056.3574881096. The cubic root of 49792181 is about 367.8920332490.

The spelling of 49792181 in words is "forty-nine million, seven hundred ninety-two thousand, one hundred eighty-one".