50981869 has 4 divisors (see below), whose sum is σ = 53198496. Its totient is φ = 48765244.

The previous prime is 50981867. The next prime is 50981873. The reversal of 50981869 is 96818905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 50981869 - 2¹ = 50981867 is a prime.

It is a super-2 number, since 2×50981869² = 5198301933466322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50981867) 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, 1108279 + ... + 1108324.

It is an arithmetic number, because the mean of its divisors is an integer number (13299624).

Almost surely, 2^50981869 is an apocalyptic number.

It is an amenable number.

50981869 is a deficient number, since it is larger than the sum of its proper divisors (2216627).

50981869 is a wasteful number, since it uses less digits than its factorization.

50981869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216626.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 50981869 is about 7140.1588917895. The cubic root of 50981869 is about 370.7990256132.

The spelling of 50981869 in words is "fifty million, nine hundred eighty-one thousand, eight hundred sixty-nine".