46809221 has 2 divisors, whose sum is σ = 46809222. Its totient is φ = 46809220.

The previous prime is 46809187. The next prime is 46809239. The reversal of 46809221 is 12290864.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25140196 + 21669025 = 5014^2 + 4655^2 .

It is a cyclic number.

It is not a de Polignac number, because 46809221 - 2¹⁸ = 46547077 is a prime.

It is a super-2 number, since 2×46809221² = 4382206341253682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46809251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23404610 + 23404611.

It is an arithmetic number, because the mean of its divisors is an integer number (23404611).

Almost surely, 2^46809221 is an apocalyptic number.

It is an amenable number.

46809221 is a deficient number, since it is larger than the sum of its proper divisors (1).

46809221 is an equidigital number, since it uses as much as digits as its factorization.

46809221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 46809221 is about 6841.7264634009. The cubic root of 46809221 is about 360.3936563181.

The spelling of 46809221 in words is "forty-six million, eight hundred nine thousand, two hundred twenty-one".