2156901147 has 12 divisors (see below), whose sum is σ = 3279499080. Its totient is φ = 1362253248.

The previous prime is 2156901139. The next prime is 2156901151. The reversal of 2156901147 is 7411096512.

It is not a de Polignac number, because 2156901147 - 2³ = 2156901139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156901947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6306558 + ... + 6306899.

It is an arithmetic number, because the mean of its divisors is an integer number (273291590).

Almost surely, 2^2156901147 is an apocalyptic number.

2156901147 is a deficient number, since it is larger than the sum of its proper divisors (1122597933).

2156901147 is a wasteful number, since it uses less digits than its factorization.

2156901147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12613482 (or 12613479 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 2156901147 is about 46442.4498384829. The cubic root of 2156901147 is about 1292.0423444205.

Adding to 2156901147 its reverse (7411096512), we get a palindrome (9567997659).

The spelling of 2156901147 in words is "two billion, one hundred fifty-six million, nine hundred one thousand, one hundred forty-seven".