50287721 has 12 divisors (see below), whose sum is σ = 56108976. Its totient is φ = 45026520.

The previous prime is 50287709. The next prime is 50287739. The reversal of 50287721 is 12778205.

It is a de Polignac number, because none of the positive numbers 2^k-50287721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50287781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5006 + ... + 11208.

It is an arithmetic number, because the mean of its divisors is an integer number (4675748).

Almost surely, 2^50287721 is an apocalyptic number.

It is an amenable number.

50287721 is a deficient number, since it is larger than the sum of its proper divisors (5821255).

50287721 is a wasteful number, since it uses less digits than its factorization.

50287721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6292 (or 6281 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 50287721 is about 7091.3835744515. The cubic root of 50287721 is about 369.1084475472.

The spelling of 50287721 in words is "fifty million, two hundred eighty-seven thousand, seven hundred twenty-one".