49315181 has 4 divisors (see below), whose sum is σ = 52216092. Its totient is φ = 46414272.

The previous prime is 49315171. The next prime is 49315183. The reversal of 49315181 is 18151394.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18151394 = 2 ⋅9075697.

It can be written as a sum of positive squares in 2 ways, for example, as 44342281 + 4972900 = 6659^2 + 2230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49315181 is a prime.

It is a super-2 number, since 2×49315181² = 4863974154125522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49315183) 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, 1450430 + ... + 1450463.

It is an arithmetic number, because the mean of its divisors is an integer number (13054023).

Almost surely, 2^49315181 is an apocalyptic number.

It is an amenable number.

49315181 is a deficient number, since it is larger than the sum of its proper divisors (2900911).

49315181 is a wasteful number, since it uses less digits than its factorization.

49315181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900910.

The product of its digits is 4320, while the sum is 32.

The square root of 49315181 is about 7022.4768422544. The cubic root of 49315181 is about 366.7134822685.

The spelling of 49315181 in words is "forty-nine million, three hundred fifteen thousand, one hundred eighty-one".