2155707547 has 12 divisors (see below), whose sum is σ = 2551556176. Its totient is φ = 1784028960.

The previous prime is 2155707511. The next prime is 2155707563. The reversal of 2155707547 is 7457075512.

It is not a de Polignac number, because 2155707547 - 2¹¹ = 2155705499 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155707577) 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, 177204 + ... + 188977.

Almost surely, 2^2155707547 is an apocalyptic number.

2155707547 is a deficient number, since it is larger than the sum of its proper divisors (395848629).

2155707547 is an equidigital number, since it uses as much as digits as its factorization.

2155707547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366246 (or 366217 counting only the distinct ones).

The product of its (nonzero) digits is 343000, while the sum is 43.

The square root of 2155707547 is about 46429.5977475575. The cubic root of 2155707547 is about 1291.8039675086.

The spelling of 2155707547 in words is "two billion, one hundred fifty-five million, seven hundred seven thousand, five hundred forty-seven".