2157210522115 has 32 divisors (see below), whose sum is σ = 2990849163264. Its totient is φ = 1476224048640.

The previous prime is 2157210522091. The next prime is 2157210522179. The reversal of 2157210522115 is 5112250127512.

It is not a de Polignac number, because 2157210522115 - 2³¹ = 2155063038467 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3478782 + ... + 4051708.

It is an arithmetic number, because the mean of its divisors is an integer number (93464036352).

Almost surely, 2^{2157210522115} is an apocalyptic number.

2157210522115 is a deficient number, since it is larger than the sum of its proper divisors (833638641149).

2157210522115 is a wasteful number, since it uses less digits than its factorization.

2157210522115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576987.

The product of its (nonzero) digits is 14000, while the sum is 34.

Adding to 2157210522115 its reverse (5112250127512), we get a palindrome (7269460649627).

The spelling of 2157210522115 in words is "two trillion, one hundred fifty-seven billion, two hundred ten million, five hundred twenty-two thousand, one hundred fifteen".