49551821 has 32 divisors (see below), whose sum is σ = 61399296. Its totient is φ = 39424000.

The previous prime is 49551811. The next prime is 49551833. The reversal of 49551821 is 12815594.

It is not a de Polignac number, because 49551821 - 2¹⁰ = 49550797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49551811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176201 + ... + 176481.

It is an arithmetic number, because the mean of its divisors is an integer number (1918728).

Almost surely, 2^49551821 is an apocalyptic number.

49551821 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

49551821 is a deficient number, since it is larger than the sum of its proper divisors (11847475).

49551821 is a wasteful number, since it uses less digits than its factorization.

49551821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its digits is 14400, while the sum is 35.

The square root of 49551821 is about 7039.3054344871. The cubic root of 49551821 is about 367.2991075043.

It can be divided in two parts, 4955 and 1821, that added together give a palindrome (6776).

The spelling of 49551821 in words is "forty-nine million, five hundred fifty-one thousand, eight hundred twenty-one".