2166251454215 has 16 divisors (see below), whose sum is σ = 2635221283968. Its totient is φ = 1709190118656.

The previous prime is 2166251454187. The next prime is 2166251454223. The reversal of 2166251454215 is 5124541526612.

It is a cyclic number.

It is not a de Polignac number, because 2166251454215 - 2³⁶ = 2097531977479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9705602 + ... + 9926288.

It is an arithmetic number, because the mean of its divisors is an integer number (164701330248).

Almost surely, 2^{2166251454215} is an apocalyptic number.

2166251454215 is a deficient number, since it is larger than the sum of its proper divisors (468969829753).

2166251454215 is a wasteful number, since it uses less digits than its factorization.

2166251454215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247658.

The product of its digits is 576000, while the sum is 44.

The spelling of 2166251454215 in words is "two trillion, one hundred sixty-six billion, two hundred fifty-one million, four hundred fifty-four thousand, two hundred fifteen".