47242353421 has 4 divisors (see below), whose sum is σ = 47297351200. Its totient is φ = 47187355644.

The previous prime is 47242353359. The next prime is 47242353449. The reversal of 47242353421 is 12435324274.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12435324274 = 2 ⋅6217662137.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47242353421 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 (47242353481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27497601 + ... + 27499318.

It is an arithmetic number, because the mean of its divisors is an integer number (11824337800).

Almost surely, 2^47242353421 is an apocalyptic number.

It is an amenable number.

47242353421 is a deficient number, since it is larger than the sum of its proper divisors (54997779).

47242353421 is an equidigital number, since it uses as much as digits as its factorization.

47242353421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54997778.

The product of its digits is 161280, while the sum is 37.

Adding to 47242353421 its reverse (12435324274), we get a palindrome (59677677695).

The spelling of 47242353421 in words is "forty-seven billion, two hundred forty-two million, three hundred fifty-three thousand, four hundred twenty-one".