2154613021 has 16 divisors (see below), whose sum is σ = 2456593920. Its totient is φ = 1870588720.

The previous prime is 2154613009. The next prime is 2154613033. The reversal of 2154613021 is 1203164512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2154613009) and next prime (2154613033).

It is not a de Polignac number, because 2154613021 - 2⁵ = 2154612989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154613051) 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 15 ways as a sum of consecutive naturals, for example, 160266 + ... + 173188.

It is an arithmetic number, because the mean of its divisors is an integer number (153537120).

Almost surely, 2^2154613021 is an apocalyptic number.

It is an amenable number.

2154613021 is a deficient number, since it is larger than the sum of its proper divisors (301980899).

2154613021 is a wasteful number, since it uses less digits than its factorization.

2154613021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13616.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2154613021 is about 46417.8093084971. The cubic root of 2154613021 is about 1291.5852995673.

Adding to 2154613021 its reverse (1203164512), we get a palindrome (3357777533).

The spelling of 2154613021 in words is "two billion, one hundred fifty-four million, six hundred thirteen thousand, twenty-one".