2191260815 has 8 divisors (see below), whose sum is σ = 2784190320. Its totient is φ = 1649890432.

The previous prime is 2191260803. The next prime is 2191260817. The reversal of 2191260815 is 5180621912.

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 2191260815 - 2⁸ = 2191260559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191260817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12889685 + ... + 12889854.

It is an arithmetic number, because the mean of its divisors is an integer number (348023790).

Almost surely, 2^2191260815 is an apocalyptic number.

2191260815 is a deficient number, since it is larger than the sum of its proper divisors (592929505).

2191260815 is a wasteful number, since it uses less digits than its factorization.

2191260815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25779561.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 2191260815 is about 46810.9048726897. The cubic root of 2191260815 is about 1298.8670237233.

The spelling of 2191260815 in words is "two billion, one hundred ninety-one million, two hundred sixty thousand, eight hundred fifteen".