2151303021 has 24 divisors (see below), whose sum is σ = 3564587520. Its totient is φ = 1224736416.

The previous prime is 2151303013. The next prime is 2151303059. The reversal of 2151303021 is 1203031512.

It is not a de Polignac number, because 2151303021 - 2³ = 2151303013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2151302985 and 2151303003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151303221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46525 + ... + 80418.

It is an arithmetic number, because the mean of its divisors is an integer number (148524480).

Almost surely, 2^2151303021 is an apocalyptic number.

2151303021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2151303021 is a deficient number, since it is larger than the sum of its proper divisors (1413284499).

2151303021 is a wasteful number, since it uses less digits than its factorization.

2151303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127225 (or 127222 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2151303021 is about 46382.1411860212. The cubic root of 2151303021 is about 1290.9235661321.

Adding to 2151303021 its reverse (1203031512), we get a palindrome (3354334533).

The spelling of 2151303021 in words is "two billion, one hundred fifty-one million, three hundred three thousand, twenty-one".