46217821 has 4 divisors (see below), whose sum is σ = 49773052. Its totient is φ = 42662592.

The previous prime is 46217797. The next prime is 46217839. The reversal of 46217821 is 12871264.

46217821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7901721 + 38316100 = 2811^2 + 6190^2 .

It is a cyclic number.

It is not a de Polignac number, because 46217821 - 2⁷ = 46217693 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 (46217021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777596 + ... + 1777621.

It is an arithmetic number, because the mean of its divisors is an integer number (12443263).

Almost surely, 2^46217821 is an apocalyptic number.

It is an amenable number.

46217821 is a deficient number, since it is larger than the sum of its proper divisors (3555231).

46217821 is a wasteful number, since it uses less digits than its factorization.

46217821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555230.

The product of its digits is 5376, while the sum is 31.

The square root of 46217821 is about 6798.3689955753. The cubic root of 46217821 is about 358.8694497159.

The spelling of 46217821 in words is "forty-six million, two hundred seventeen thousand, eight hundred twenty-one".