49902221 has 2 divisors, whose sum is σ = 49902222. Its totient is φ = 49902220.

The previous prime is 49902217. The next prime is 49902241. The reversal of 49902221 is 12220994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48930025 + 972196 = 6995^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 49902221 - 2² = 49902217 is a prime.

It is a Sophie Germain 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 (49902241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24951110 + 24951111.

It is an arithmetic number, because the mean of its divisors is an integer number (24951111).

Almost surely, 2^49902221 is an apocalyptic number.

It is an amenable number.

49902221 is a deficient number, since it is larger than the sum of its proper divisors (1).

49902221 is an equidigital number, since it uses as much as digits as its factorization.

49902221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 49902221 is about 7064.1504089310. The cubic root of 49902221 is about 368.1628458741.

The spelling of 49902221 in words is "forty-nine million, nine hundred two thousand, two hundred twenty-one".