2157180263 has 12 divisors (see below), whose sum is σ = 2523247272. Its totient is φ = 1838788560.

The previous prime is 2157180251. The next prime is 2157180287. The reversal of 2157180263 is 3620817512.

It is a happy number.

2157180263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2157180263 - 2⁴ = 2157180247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157180163) 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, 112745 + ... + 130482.

It is an arithmetic number, because the mean of its divisors is an integer number (210270606).

Almost surely, 2^2157180263 is an apocalyptic number.

2157180263 is a deficient number, since it is larger than the sum of its proper divisors (366067009).

2157180263 is a wasteful number, since it uses less digits than its factorization.

2157180263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243422 (or 243415 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2157180263 is about 46445.4547076460. The cubic root of 2157180263 is about 1292.0980747038.

Adding to 2157180263 its reverse (3620817512), we get a palindrome (5777997775).

The spelling of 2157180263 in words is "two billion, one hundred fifty-seven million, one hundred eighty thousand, two hundred sixty-three".