49999521 has 16 divisors (see below), whose sum is σ = 78321600. Its totient is φ = 27971520.

The previous prime is 49999489. The next prime is 49999529. The reversal of 49999521 is 12599994.

It is not a de Polignac number, because 49999521 - 2⁵ = 49999489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49999529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57846 + ... + 58703.

It is an arithmetic number, because the mean of its divisors is an integer number (4895100).

Almost surely, 2^49999521 is an apocalyptic number.

It is an amenable number.

49999521 is a deficient number, since it is larger than the sum of its proper divisors (28322079).

49999521 is a wasteful number, since it uses less digits than its factorization.

49999521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116576.

The product of its digits is 262440, while the sum is 48.

The square root of 49999521 is about 7071.0339413695. The cubic root of 49999521 is about 368.4019734262.

The spelling of 49999521 in words is "forty-nine million, nine hundred ninety-nine thousand, five hundred twenty-one".