47238717781531 has 4 divisors (see below), whose sum is σ = 47904051834864. Its totient is φ = 46573383728200.

The previous prime is 47238717781501. The next prime is 47238717781621. The reversal of 47238717781531 is 13518771783274.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47238717781531 - 2⁹ = 47238717781019 is a prime.

It is a super-2 number, since 2×47238717781531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47238717781501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332667026560 + ... + 332667026701.

It is an arithmetic number, because the mean of its divisors is an integer number (11976012958716).

Almost surely, 2^{47238717781531} is an apocalyptic number.

47238717781531 is a deficient number, since it is larger than the sum of its proper divisors (665334053333).

47238717781531 is an equidigital number, since it uses as much as digits as its factorization.

47238717781531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665334053332.

The product of its digits is 55319040, while the sum is 64.

The spelling of 47238717781531 in words is "forty-seven trillion, two hundred thirty-eight billion, seven hundred seventeen million, seven hundred eighty-one thousand, five hundred thirty-one".