49819831 has 4 divisors (see below), whose sum is σ = 49963752. Its totient is φ = 49675912.

The previous prime is 49819823. The next prime is 49819853. The reversal of 49819831 is 13891894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13891894 = 2 ⋅6945947.

It is a cyclic number.

It is not a de Polignac number, because 49819831 - 2³ = 49819823 is a prime.

It is a super-2 number, since 2×49819831² = 4964031121737122, 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 (49819331) 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, 71440 + ... + 72133.

It is an arithmetic number, because the mean of its divisors is an integer number (12490938).

Almost surely, 2^49819831 is an apocalyptic number.

49819831 is a deficient number, since it is larger than the sum of its proper divisors (143921).

49819831 is a wasteful number, since it uses less digits than its factorization.

49819831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143920.

The product of its digits is 62208, while the sum is 43.

The square root of 49819831 is about 7058.3164423253. The cubic root of 49819831 is about 367.9601184529.

The spelling of 49819831 in words is "forty-nine million, eight hundred nineteen thousand, eight hundred thirty-one".