50356981 has 8 divisors (see below), whose sum is σ = 51087960. Its totient is φ = 49631232.

The previous prime is 50356961. The next prime is 50356991. The reversal of 50356981 is 18965305.

It can be written as a sum of positive squares in 4 ways, for example, as 654481 + 49702500 = 809^2 + 7050^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50356981 - 2⁷ = 50356853 is a prime.

It is a super-2 number, since 2×50356981² = 5071651070868722, 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 50356981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50356931) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20655 + ... + 22963.

It is an arithmetic number, because the mean of its divisors is an integer number (6385995).

Almost surely, 2^50356981 is an apocalyptic number.

It is an amenable number.

50356981 is a deficient number, since it is larger than the sum of its proper divisors (730979).

50356981 is a wasteful number, since it uses less digits than its factorization.

50356981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 50356981 is about 7096.2652853455. The cubic root of 50356981 is about 369.2778243727.

The spelling of 50356981 in words is "fifty million, three hundred fifty-six thousand, nine hundred eighty-one".