2143770521 has 8 divisors (see below), whose sum is σ = 2183557824. Its totient is φ = 2104249840.

The previous prime is 2143770493. The next prime is 2143770523. The reversal of 2143770521 is 1250773412.

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 2143770521 - 2¹⁰ = 2143769497 is a prime.

It is a super-2 number, since 2×2143770521² = 9191504093417222882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143770523) 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, 50390 + ... + 82623.

It is an arithmetic number, because the mean of its divisors is an integer number (272944728).

Almost surely, 2^2143770521 is an apocalyptic number.

It is an amenable number.

2143770521 is a deficient number, since it is larger than the sum of its proper divisors (39787303).

2143770521 is a wasteful number, since it uses less digits than its factorization.

2143770521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133311.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 2143770521 is about 46300.8695490700. The cubic root of 2143770521 is about 1289.4151387973.

The spelling of 2143770521 in words is "two billion, one hundred forty-three million, seven hundred seventy thousand, five hundred twenty-one".