49172181 has 8 divisors (see below), whose sum is σ = 66800160. Its totient is φ = 32162832.

The previous prime is 49172173. The next prime is 49172191. The reversal of 49172181 is 18127194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49172181 - 2³ = 49172173 is a prime.

It is a super-2 number, since 2×49172181² = 4835806768593522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49172111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154471 + ... + 154788.

It is an arithmetic number, because the mean of its divisors is an integer number (8350020).

Almost surely, 2^49172181 is an apocalyptic number.

It is an amenable number.

49172181 is a deficient number, since it is larger than the sum of its proper divisors (17627979).

49172181 is a wasteful number, since it uses less digits than its factorization.

49172181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309315.

The product of its digits is 4032, while the sum is 33.

The square root of 49172181 is about 7012.2878577537. The cubic root of 49172181 is about 366.3586841734.

The spelling of 49172181 in words is "forty-nine million, one hundred seventy-two thousand, one hundred eighty-one".