49187221 has 2 divisors, whose sum is σ = 49187222. Its totient is φ = 49187220.

The previous prime is 49187207. The next prime is 49187269. The reversal of 49187221 is 12278194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31798321 + 17388900 = 5639^2 + 4170^2 .

It is a cyclic number.

It is not a de Polignac number, because 49187221 - 2¹³ = 49179029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49187291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24593610 + 24593611.

It is an arithmetic number, because the mean of its divisors is an integer number (24593611).

Almost surely, 2^49187221 is an apocalyptic number.

It is an amenable number.

49187221 is a deficient number, since it is larger than the sum of its proper divisors (1).

49187221 is an equidigital number, since it uses as much as digits as its factorization.

49187221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 49187221 is about 7013.3601789727. The cubic root of 49187221 is about 366.3960323434.

The spelling of 49187221 in words is "forty-nine million, one hundred eighty-seven thousand, two hundred twenty-one".