2170420515 has 80 divisors (see below), whose sum is σ = 4252849920. Its totient is φ = 1054218240.

The previous prime is 2170420501. The next prime is 2170420517. The reversal of 2170420515 is 5150240712.

It is not a de Polignac number, because 2170420515 - 2²¹ = 2168323363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2170420517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 208351 + ... + 218519.

It is an arithmetic number, because the mean of its divisors is an integer number (53160624).

Almost surely, 2^2170420515 is an apocalyptic number.

2170420515 is a deficient number, since it is larger than the sum of its proper divisors (2082429405).

2170420515 is a wasteful number, since it uses less digits than its factorization.

2170420515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10234 (or 10225 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 2170420515 is about 46587.7721618023. The cubic root of 2170420515 is about 1294.7362133713.

The spelling of 2170420515 in words is "two billion, one hundred seventy million, four hundred twenty thousand, five hundred fifteen".