147242281821 has 4 divisors (see below), whose sum is σ = 196323042432. Its totient is φ = 98161521212.

The previous prime is 147242281819. The next prime is 147242281841. The reversal of 147242281821 is 128182242741.

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 not a de Polignac number, because 147242281821 - 2¹ = 147242281819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147242281841) 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, 24540380301 + ... + 24540380306.

It is an arithmetic number, because the mean of its divisors is an integer number (49080760608).

Almost surely, 2^147242281821 is an apocalyptic number.

It is an amenable number.

147242281821 is a deficient number, since it is larger than the sum of its proper divisors (49080760611).

147242281821 is an equidigital number, since it uses as much as digits as its factorization.

147242281821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49080760610.

The product of its digits is 114688, while the sum is 42.

The spelling of 147242281821 in words is "one hundred forty-seven billion, two hundred forty-two million, two hundred eighty-one thousand, eight hundred twenty-one".