49351379221 has 4 divisors (see below), whose sum is σ = 49352836032. Its totient is φ = 49349922412.

The previous prime is 49351379179. The next prime is 49351379227. The reversal of 49351379221 is 12297315394.

It is a happy number.

49351379221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49351379221 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 (49351379227) 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, 676351 + ... + 745756.

It is an arithmetic number, because the mean of its divisors is an integer number (12338209008).

Almost surely, 2^49351379221 is an apocalyptic number.

It is an amenable number.

49351379221 is a deficient number, since it is larger than the sum of its proper divisors (1456811).

49351379221 is a wasteful number, since it uses less digits than its factorization.

49351379221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456810.

The product of its digits is 408240, while the sum is 46.

The spelling of 49351379221 in words is "forty-nine billion, three hundred fifty-one million, three hundred seventy-nine thousand, two hundred twenty-one".