49149281 has 4 divisors (see below), whose sum is σ = 49186452. Its totient is φ = 49112112.

The previous prime is 49149277. The next prime is 49149307. The reversal of 49149281 is 18294194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18294194 = 2 ⋅9147097.

It can be written as a sum of positive squares in 2 ways, for example, as 28718881 + 20430400 = 5359^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 49149281 - 2² = 49149277 is a prime.

It is a super-2 number, since 2×49149281² = 4831303645633922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49149211) 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, 16526 + ... + 19271.

It is an arithmetic number, because the mean of its divisors is an integer number (12296613).

Almost surely, 2^49149281 is an apocalyptic number.

It is an amenable number.

49149281 is a deficient number, since it is larger than the sum of its proper divisors (37171).

49149281 is a wasteful number, since it uses less digits than its factorization.

49149281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37170.

The product of its digits is 20736, while the sum is 38.

The square root of 49149281 is about 7010.6548196299. The cubic root of 49149281 is about 366.3018029829.

The spelling of 49149281 in words is "forty-nine million, one hundred forty-nine thousand, two hundred eighty-one".