49915921 has 8 divisors (see below), whose sum is σ = 56210688. Its totient is φ = 43914000.

The previous prime is 49915903. The next prime is 49915933. The reversal of 49915921 is 12951994.

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 49915921 - 2¹¹ = 49913873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49915981) 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, 72850 + ... + 73531.

It is an arithmetic number, because the mean of its divisors is an integer number (7026336).

Almost surely, 2^49915921 is an apocalyptic number.

It is an amenable number.

49915921 is a deficient number, since it is larger than the sum of its proper divisors (6294767).

49915921 is a wasteful number, since it uses less digits than its factorization.

49915921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146423.

The product of its digits is 29160, while the sum is 40.

The square root of 49915921 is about 7065.1200272890. The cubic root of 49915921 is about 368.1965342176.

The spelling of 49915921 in words is "forty-nine million, nine hundred fifteen thousand, nine hundred twenty-one".