2156481575 has 12 divisors (see below), whose sum is σ = 2681104440. Its totient is φ = 1720625760.

The previous prime is 2156481563. The next prime is 2156481599. The reversal of 2156481575 is 5751846512.

It is not a de Polignac number, because 2156481575 - 2⁴ = 2156481559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104324 + ... + 123273.

It is an arithmetic number, because the mean of its divisors is an integer number (223425370).

Almost surely, 2^2156481575 is an apocalyptic number.

2156481575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2156481575 is a deficient number, since it is larger than the sum of its proper divisors (524622865).

2156481575 is a wasteful number, since it uses less digits than its factorization.

2156481575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227986 (or 227981 counting only the distinct ones).

The product of its digits is 336000, while the sum is 44.

The square root of 2156481575 is about 46437.9325013507. The cubic root of 2156481575 is about 1291.9585606479.

The spelling of 2156481575 in words is "two billion, one hundred fifty-six million, four hundred eighty-one thousand, five hundred seventy-five".