4148558021 has 4 divisors (see below), whose sum is σ = 4366903200. Its totient is φ = 3930212844.

The previous prime is 4148557969. The next prime is 4148558023. The reversal of 4148558021 is 1208558414.

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-4148558021 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 (4148558023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109172561 + ... + 109172598.

It is an arithmetic number, because the mean of its divisors is an integer number (1091725800).

Almost surely, 2^4148558021 is an apocalyptic number.

It is an amenable number.

4148558021 is a deficient number, since it is larger than the sum of its proper divisors (218345179).

4148558021 is a wasteful number, since it uses less digits than its factorization.

4148558021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218345178.

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 4148558021 is about 64409.3007336673. The cubic root of 4148558021 is about 1606.8144283438.

The spelling of 4148558021 in words is "four billion, one hundred forty-eight million, five hundred fifty-eight thousand, twenty-one".