49281821 has 2 divisors, whose sum is σ = 49281822. Its totient is φ = 49281820.

The previous prime is 49281811. The next prime is 49281851. The reversal of 49281821 is 12818294.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 4056196 = 6725^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 49281821 - 2²² = 45087517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49281811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24640910 + 24640911.

It is an arithmetic number, because the mean of its divisors is an integer number (24640911).

Almost surely, 2^49281821 is an apocalyptic number.

It is an amenable number.

49281821 is a deficient number, since it is larger than the sum of its proper divisors (1).

49281821 is an equidigital number, since it uses as much as digits as its factorization.

49281821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 35.

The square root of 49281821 is about 7020.1012100966. The cubic root of 49281821 is about 366.6307739889.

The spelling of 49281821 in words is "forty-nine million, two hundred eighty-one thousand, eight hundred twenty-one".