2153571705 has 64 divisors (see below), whose sum is σ = 4001495040. Its totient is φ = 1111345920.

The previous prime is 2153571683. The next prime is 2153571727. The reversal of 2153571705 is 5071753512.

It is a happy number.

2153571705 is a `hidden beast` number, since 2 + 15 + 3 + 571 + 70 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2153571683) and next prime (2153571727).

It is not a de Polignac number, because 2153571705 - 2²⁴ = 2136794489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2153571705.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 335809 + ... + 342161.

It is an arithmetic number, because the mean of its divisors is an integer number (62523360).

Almost surely, 2^2153571705 is an apocalyptic number.

It is an amenable number.

2153571705 is a deficient number, since it is larger than the sum of its proper divisors (1847923335).

2153571705 is an frugal number, since it uses more digits than its factorization.

2153571705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410 (or 6392 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 2153571705 is about 46406.5911805640. The cubic root of 2153571705 is about 1291.3771933393.

The spelling of 2153571705 in words is "two billion, one hundred fifty-three million, five hundred seventy-one thousand, seven hundred five".