50721407 has 8 divisors (see below), whose sum is σ = 55665792. Its totient is φ = 45832600.

The previous prime is 50721403. The next prime is 50721409. The reversal of 50721407 is 70412705.

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

It is not a de Polignac number, because 50721407 - 2² = 50721403 is a prime.

It is a super-2 number, since 2×50721407² = 5145322256119298, 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 (50721403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11969 + ... + 15642.

It is an arithmetic number, because the mean of its divisors is an integer number (6958224).

Almost surely, 2^50721407 is an apocalyptic number.

50721407 is a deficient number, since it is larger than the sum of its proper divisors (4944385).

50721407 is a wasteful number, since it uses less digits than its factorization.

50721407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27789.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 50721407 is about 7121.8963064622. The cubic root of 50721407 is about 370.1664870428.

The spelling of 50721407 in words is "fifty million, seven hundred twenty-one thousand, four hundred seven".