49151 has 4 divisors (see below), whose sum is σ = 51312. Its totient is φ = 46992.

The previous prime is 49139. The next prime is 49157. The reversal of 49151 is 15194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49151 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 4, base 8 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49157) by changing a digit.

Being equal to 12×2¹²-1, it is a Woodall number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046 + ... + 1091.

It is an arithmetic number, because the mean of its divisors is an integer number (12828).

2⁴⁹¹⁵¹ is an apocalyptic number.

49151 is a deficient number, since it is larger than the sum of its proper divisors (2161).

49151 is a wasteful number, since it uses less digits than its factorization.

49151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its digits is 180, while the sum is 20.

The square root of 49151 is about 221.7002480829. The cubic root of 49151 is about 36.6306073411.

The spelling of 49151 in words is "forty-nine thousand, one hundred fifty-one".