49431421 has 4 divisors (see below), whose sum is σ = 53233852. Its totient is φ = 45628992.

The previous prime is 49431419. The next prime is 49431433. The reversal of 49431421 is 12413494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12413494 = 2 ⋅6206747.

It can be written as a sum of positive squares in 2 ways, for example, as 5062500 + 44368921 = 2250^2 + 6661^2 .

It is a cyclic number.

It is not a de Polignac number, because 49431421 - 2¹ = 49431419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49431421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49432421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901196 + ... + 1901221.

It is an arithmetic number, because the mean of its divisors is an integer number (13308463).

Almost surely, 2^49431421 is an apocalyptic number.

It is an amenable number.

49431421 is a deficient number, since it is larger than the sum of its proper divisors (3802431).

49431421 is a wasteful number, since it uses less digits than its factorization.

49431421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802430.

The product of its digits is 3456, while the sum is 28.

The square root of 49431421 is about 7030.7482532089. The cubic root of 49431421 is about 367.0013809539.

The spelling of 49431421 in words is "forty-nine million, four hundred thirty-one thousand, four hundred twenty-one".