49912821 has 48 divisors (see below), whose sum is σ = 88865280. Its totient is φ = 27578880.

The previous prime is 49912813. The next prime is 49912831. The reversal of 49912821 is 12821994.

It is not a de Polignac number, because 49912821 - 2³ = 49912813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49912831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40405 + ... + 41621.

It is an arithmetic number, because the mean of its divisors is an integer number (1851360).

Almost surely, 2^49912821 is an apocalyptic number.

It is an amenable number.

49912821 is a deficient number, since it is larger than the sum of its proper divisors (38952459).

49912821 is a wasteful number, since it uses less digits than its factorization.

49912821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1258 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 49912821 is about 7064.9006362439. The cubic root of 49912821 is about 368.1889118474.

The spelling of 49912821 in words is "forty-nine million, nine hundred twelve thousand, eight hundred twenty-one".