49981421 has 24 divisors (see below), whose sum is σ = 59979960. Its totient is φ = 41513472.

The previous prime is 49981417. The next prime is 49981423. The reversal of 49981421 is 12418994.

It can be written as a sum of positive squares in 4 ways, for example, as 1177225 + 48804196 = 1085^2 + 6986^2 .

It is not a de Polignac number, because 49981421 - 2² = 49981417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49981423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 318275 + ... + 318431.

It is an arithmetic number, because the mean of its divisors is an integer number (2499165).

Almost surely, 2^49981421 is an apocalyptic number.

It is an amenable number.

49981421 is a deficient number, since it is larger than the sum of its proper divisors (9998539).

49981421 is a wasteful number, since it uses less digits than its factorization.

49981421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 326 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 49981421 is about 7069.7539561147. The cubic root of 49981421 is about 368.3575137969.

The spelling of 49981421 in words is "forty-nine million, nine hundred eighty-one thousand, four hundred twenty-one".