49133881 has 4 divisors (see below), whose sum is σ = 49187700. Its totient is φ = 49080064.

The previous prime is 49133863. The next prime is 49133897. The reversal of 49133881 is 18833194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18833194 = 2 ⋅9416597.

It can be written as a sum of positive squares in 2 ways, for example, as 13838400 + 35295481 = 3720^2 + 5941^2 .

It is a cyclic number.

It is not a de Polignac number, because 49133881 - 2¹¹ = 49131833 is a prime.

It is a super-2 number, since 2×49133881² = 4828276524244322, which contains 22 as substring.

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 49133881.

It is not an unprimeable number, because it can be changed into a prime (49133831) 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, 25516 + ... + 27373.

It is an arithmetic number, because the mean of its divisors is an integer number (12296925).

Almost surely, 2^49133881 is an apocalyptic number.

It is an amenable number.

49133881 is a deficient number, since it is larger than the sum of its proper divisors (53819).

49133881 is an equidigital number, since it uses as much as digits as its factorization.

49133881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53818.

The product of its digits is 20736, while the sum is 37.

The square root of 49133881 is about 7009.5564053655. The cubic root of 49133881 is about 366.2635410665.

The spelling of 49133881 in words is "forty-nine million, one hundred thirty-three thousand, eight hundred eighty-one".