2131640847 has 16 divisors (see below), whose sum is σ = 3609127680. Its totient is φ = 1218080376.

The previous prime is 2131640821. The next prime is 2131640873. The reversal of 2131640847 is 7480461312.

2131640847 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 640 + 8 + 4 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (2131640821) and next prime (2131640873).

It is not a de Polignac number, because 2131640847 - 2⁶ = 2131640783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131640887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5639073 + ... + 5639450.

It is an arithmetic number, because the mean of its divisors is an integer number (225570480).

Almost surely, 2^2131640847 is an apocalyptic number.

2131640847 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2131640847 is a deficient number, since it is larger than the sum of its proper divisors (1477486833).

2131640847 is a wasteful number, since it uses less digits than its factorization.

2131640847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11278539 (or 11278533 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 2131640847 is about 46169.6961978309. The cubic root of 2131640847 is about 1286.9786565758.

The spelling of 2131640847 in words is "two billion, one hundred thirty-one million, six hundred forty thousand, eight hundred forty-seven".