50981385 has 80 divisors (see below), whose sum is σ = 106932096. Its totient is φ = 20247552.

The previous prime is 50981321. The next prime is 50981423. The reversal of 50981385 is 58318905.

It is not a de Polignac number, because 50981385 - 2⁶ = 50981321 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2998897 + ... + 2998913.

Almost surely, 2^50981385 is an apocalyptic number.

It is an amenable number.

50981385 is an abundant number, since it is smaller than the sum of its proper divisors (55950711).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50981385 is an equidigital number, since it uses as much as digits as its factorization.

50981385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 50981385 is about 7140.1249989058. The cubic root of 50981385 is about 370.7978522071.

The spelling of 50981385 in words is "fifty million, nine hundred eighty-one thousand, three hundred eighty-five".