49920521 has 4 divisors (see below), whose sum is σ = 57052032. Its totient is φ = 42789012.

The previous prime is 49920503. The next prime is 49920523. The reversal of 49920521 is 12502994.

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 49920521 - 2⁶ = 49920457 is a prime.

It is a super-2 number, since 2×49920521² = 4984116833822882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49920523) 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, 3565745 + ... + 3565758.

It is an arithmetic number, because the mean of its divisors is an integer number (14263008).

Almost surely, 2^49920521 is an apocalyptic number.

It is an amenable number.

49920521 is a deficient number, since it is larger than the sum of its proper divisors (7131511).

49920521 is an equidigital number, since it uses as much as digits as its factorization.

49920521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131510.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 49920521 is about 7065.4455627370. The cubic root of 49920521 is about 368.2078442498.

The spelling of 49920521 in words is "forty-nine million, nine hundred twenty thousand, five hundred twenty-one".