49993281 has 40 divisors (see below), whose sum is σ = 81169704. Its totient is φ = 30481920.

The previous prime is 49993271. The next prime is 49993337. The reversal of 49993281 is 18239994.

It can be written as a sum of positive squares in 4 ways, for example, as 18352656 + 31640625 = 4284^2 + 5625^2 .

It is not a de Polignac number, because 49993281 - 2⁹ = 49992769 is a prime.

It is a super-2 number, since 2×49993281² = 4998656290289922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49993201) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 207321 + ... + 207561.

Almost surely, 2^49993281 is an apocalyptic number.

It is an amenable number.

49993281 is a deficient number, since it is larger than the sum of its proper divisors (31176423).

49993281 is a wasteful number, since it uses less digits than its factorization.

49993281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 454 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 49993281 is about 7070.5926908570. The cubic root of 49993281 is about 368.3866471197.

The spelling of 49993281 in words is "forty-nine million, nine hundred ninety-three thousand, two hundred eighty-one".