2159252685 has 24 divisors (see below), whose sum is σ = 3804065304. Its totient is φ = 1132721280.

The previous prime is 2159252657. The next prime is 2159252717. The reversal of 2159252685 is 5862529512.

2159252685 is a `hidden beast` number, since 2 + 1 + 592 + 52 + 6 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 166255236 + 1992997449 = 12894^2 + 44643^2 .

It is not a de Polignac number, because 2159252685 - 2¹¹ = 2159250637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2159252685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390562 + ... + 396051.

It is an arithmetic number, because the mean of its divisors is an integer number (158502721).

Almost surely, 2^2159252685 is an apocalyptic number.

It is an amenable number.

2159252685 is a deficient number, since it is larger than the sum of its proper divisors (1644812619).

2159252685 is a wasteful number, since it uses less digits than its factorization.

2159252685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786685 (or 786682 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The square root of 2159252685 is about 46467.7596296615. The cubic root of 2159252685 is about 1292.5117189195.

The spelling of 2159252685 in words is "two billion, one hundred fifty-nine million, two hundred fifty-two thousand, six hundred eighty-five".