2148597021 has 4 divisors (see below), whose sum is σ = 2864796032. Its totient is φ = 1432398012.

The previous prime is 2148597019. The next prime is 2148597023. The reversal of 2148597021 is 1207958412.

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 an interprime number because it is at equal distance from previous prime (2148597019) and next prime (2148597023).

It is not a de Polignac number, because 2148597021 - 2¹ = 2148597019 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 (2148597023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358099501 + ... + 358099506.

It is an arithmetic number, because the mean of its divisors is an integer number (716199008).

Almost surely, 2^2148597021 is an apocalyptic number.

It is an amenable number.

2148597021 is a deficient number, since it is larger than the sum of its proper divisors (716199011).

2148597021 is an equidigital number, since it uses as much as digits as its factorization.

2148597021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716199010.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 2148597021 is about 46352.9612969873. The cubic root of 2148597021 is about 1290.3820795992.

The spelling of 2148597021 in words is "two billion, one hundred forty-eight million, five hundred ninety-seven thousand, twenty-one".