50781321 has 6 divisors (see below), whose sum is σ = 73350810. Its totient is φ = 33854208.

The previous prime is 50781301. The next prime is 50781347. The reversal of 50781321 is 12318705.

It can be written as a sum of positive squares in only one way, i.e., 48108096 + 2673225 = 6936^2 + 1635^2 .

It is not a de Polignac number, because 50781321 - 2⁶ = 50781257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50781301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2821176 + ... + 2821193.

It is an arithmetic number, because the mean of its divisors is an integer number (12225135).

Almost surely, 2^50781321 is an apocalyptic number.

It is an amenable number.

50781321 is a deficient number, since it is larger than the sum of its proper divisors (22569489).

50781321 is a wasteful number, since it uses less digits than its factorization.

50781321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5642375 (or 5642372 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 50781321 is about 7126.1013885574. The cubic root of 50781321 is about 370.3121811352.

The spelling of 50781321 in words is "fifty million, seven hundred eighty-one thousand, three hundred twenty-one".