2161497715 has 32 divisors (see below), whose sum is σ = 2820787200. Its totient is φ = 1580584320.

The previous prime is 2161497713. The next prime is 2161497721. The reversal of 2161497715 is 5177941612.

It is a happy number.

2161497715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2161497715 - 2¹ = 2161497713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161497713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4923466 + ... + 4923904.

It is an arithmetic number, because the mean of its divisors is an integer number (88149600).

Almost surely, 2^2161497715 is an apocalyptic number.

2161497715 is a deficient number, since it is larger than the sum of its proper divisors (659289485).

2161497715 is a wasteful number, since it uses less digits than its factorization.

2161497715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its digits is 105840, while the sum is 43.

The square root of 2161497715 is about 46491.9102102721. The cubic root of 2161497715 is about 1292.9595162088.

The spelling of 2161497715 in words is "two billion, one hundred sixty-one million, four hundred ninety-seven thousand, seven hundred fifteen".