50721761 has 8 divisors (see below), whose sum is σ = 54463104. Its totient is φ = 47064640.

The previous prime is 50721757. The next prime is 50721767. The reversal of 50721761 is 16712705.

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 50721761 - 2² = 50721757 is a prime.

It is a super-2 number, since 2×50721761² = 5145394077882242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50721767) 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, 19805 + ... + 22218.

It is an arithmetic number, because the mean of its divisors is an integer number (6807888).

Almost surely, 2^50721761 is an apocalyptic number.

It is an amenable number.

50721761 is a deficient number, since it is larger than the sum of its proper divisors (3741343).

50721761 is a wasteful number, since it uses less digits than its factorization.

50721761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42111.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 50721761 is about 7121.9211593502. The cubic root of 50721761 is about 370.1673482087.

The spelling of 50721761 in words is "fifty million, seven hundred twenty-one thousand, seven hundred sixty-one".