2151671575 has 12 divisors (see below), whose sum is σ = 2668660048. Its totient is φ = 1720958400.

The previous prime is 2151671573. The next prime is 2151671593. The reversal of 2151671575 is 5751761512.

It is not a de Polignac number, because 2151671575 - 2¹ = 2151671573 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151671573) 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 11 ways as a sum of consecutive naturals, for example, 183334 + ... + 194716.

Almost surely, 2^2151671575 is an apocalyptic number.

2151671575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2151671575 is a deficient number, since it is larger than the sum of its proper divisors (516988473).

2151671575 is a wasteful number, since it uses less digits than its factorization.

2151671575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18954 (or 18949 counting only the distinct ones).

The product of its digits is 73500, while the sum is 40.

The square root of 2151671575 is about 46386.1140321109. The cubic root of 2151671575 is about 1290.9972808177.

The spelling of 2151671575 in words is "two billion, one hundred fifty-one million, six hundred seventy-one thousand, five hundred seventy-five".