50721420 has 24 divisors (see below), whose sum is σ = 142020144. Its totient is φ = 13525696.

The previous prime is 50721409. The next prime is 50721443. The reversal of 50721420 is 2412705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422619 + ... + 422738.

It is an arithmetic number, because the mean of its divisors is an integer number (5917506).

Almost surely, 2^50721420 is an apocalyptic number.

It is an amenable number.

50721420 is an abundant number, since it is smaller than the sum of its proper divisors (91298724).

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

50721420 is a wasteful number, since it uses less digits than its factorization.

50721420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845369 (or 845367 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 50721420 is about 7121.8972191404. The cubic root of 50721420 is about 370.1665186676.

The spelling of 50721420 in words is "fifty million, seven hundred twenty-one thousand, four hundred twenty".