49500021 has 4 divisors (see below), whose sum is σ = 66000032. Its totient is φ = 33000012.

The previous prime is 49499987. The next prime is 49500023. The reversal of 49500021 is 12000594.

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.

It is not a de Polignac number, because 49500021 - 2⁷ = 49499893 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 (49500023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8250001 + ... + 8250006.

It is an arithmetic number, because the mean of its divisors is an integer number (16500008).

Almost surely, 2^49500021 is an apocalyptic number.

It is an amenable number.

49500021 is a deficient number, since it is larger than the sum of its proper divisors (16500011).

49500021 is a wasteful number, since it uses less digits than its factorization.

49500021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16500010.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 49500021 is about 7035.6251321400. The cubic root of 49500021 is about 367.1710750257.

The spelling of 49500021 in words is "forty-nine million, five hundred thousand, twenty-one".