49551421 has 2 divisors, whose sum is σ = 49551422. Its totient is φ = 49551420.

The previous prime is 49551419. The next prime is 49551427. The reversal of 49551421 is 12415594.

49551421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48372025 + 1179396 = 6955^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 49551421 - 2¹ = 49551419 is a prime.

Together with 49551419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49551427) 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 as a sum of consecutive naturals, namely, 24775710 + 24775711.

It is an arithmetic number, because the mean of its divisors is an integer number (24775711).

Almost surely, 2^49551421 is an apocalyptic number.

It is an amenable number.

49551421 is a deficient number, since it is larger than the sum of its proper divisors (1).

49551421 is an equidigital number, since it uses as much as digits as its factorization.

49551421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 49551421 is about 7039.2770225358. The cubic root of 49551421 is about 367.2981191785.

The spelling of 49551421 in words is "forty-nine million, five hundred fifty-one thousand, four hundred twenty-one".