2151345521 has 8 divisors (see below), whose sum is σ = 2323515264. Its totient is φ = 1980130320.

The previous prime is 2151345517. The next prime is 2151345569. The reversal of 2151345521 is 1255431512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2151345521 - 2² = 2151345517 is a prime.

It is a super-2 number, since 2×2151345521² = 9256575101453522882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151345571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233945 + ... + 242966.

It is an arithmetic number, because the mean of its divisors is an integer number (290439408).

Almost surely, 2^2151345521 is an apocalyptic number.

It is an amenable number.

2151345521 is a deficient number, since it is larger than the sum of its proper divisors (172169743).

2151345521 is a wasteful number, since it uses less digits than its factorization.

2151345521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477271.

The product of its digits is 6000, while the sum is 29.

The square root of 2151345521 is about 46382.5993342331. The cubic root of 2151345521 is about 1290.9320670096.

The spelling of 2151345521 in words is "two billion, one hundred fifty-one million, three hundred forty-five thousand, five hundred twenty-one".