2157400705 has 8 divisors (see below), whose sum is σ = 2589206400. Its totient is φ = 1725703536.

The previous prime is 2157400649. The next prime is 2157400711. The reversal of 2157400705 is 5070047512.

2157400705 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 2157400705 - 2¹⁹ = 2156876417 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26106 + ... + 70684.

It is an arithmetic number, because the mean of its divisors is an integer number (323650800).

Almost surely, 2^2157400705 is an apocalyptic number.

It is an amenable number.

2157400705 is a deficient number, since it is larger than the sum of its proper divisors (431805695).

2157400705 is an equidigital number, since it uses as much as digits as its factorization.

2157400705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54263.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 2157400705 is about 46447.8277748271. The cubic root of 2157400705 is about 1292.1420863220.

The spelling of 2157400705 in words is "two billion, one hundred fifty-seven million, four hundred thousand, seven hundred five".