2155863347 has 32 divisors (see below), whose sum is σ = 2610123264. Its totient is φ = 1756480000.

The previous prime is 2155863343. The next prime is 2155863361. The reversal of 2155863347 is 7433685512.

It is not a de Polignac number, because 2155863347 - 2² = 2155863343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2155863298 and 2155863307.

It is not an unprimeable number, because it can be changed into a prime (2155863341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1078553 + ... + 1080549.

It is an arithmetic number, because the mean of its divisors is an integer number (81566352).

Almost surely, 2^2155863347 is an apocalyptic number.

2155863347 is a deficient number, since it is larger than the sum of its proper divisors (454259917).

2155863347 is a wasteful number, since it uses less digits than its factorization.

2155863347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299.

The product of its digits is 604800, while the sum is 44.

The square root of 2155863347 is about 46431.2755263088. The cubic root of 2155863347 is about 1291.8350877178.

The spelling of 2155863347 in words is "two billion, one hundred fifty-five million, eight hundred sixty-three thousand, three hundred forty-seven".