50729213 has 4 divisors (see below), whose sum is σ = 50870880. Its totient is φ = 50587548.

The previous prime is 50729209. The next prime is 50729219. The reversal of 50729213 is 31292705.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31292705 = 5 ⋅6258541.

It is a cyclic number.

It is not a de Polignac number, because 50729213 - 2² = 50729209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50729219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70295 + ... + 71012.

It is an arithmetic number, because the mean of its divisors is an integer number (12717720).

Almost surely, 2^50729213 is an apocalyptic number.

It is an amenable number.

50729213 is a deficient number, since it is larger than the sum of its proper divisors (141667).

50729213 is a wasteful number, since it uses less digits than its factorization.

50729213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141666.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 50729213 is about 7122.4443135766. Note that the first 3 decimals coincide. The cubic root of 50729213 is about 370.1854755498.

The spelling of 50729213 in words is "fifty million, seven hundred twenty-nine thousand, two hundred thirteen".