2157235277 has 8 divisors (see below), whose sum is σ = 2163594240. Its totient is φ = 2150886400.

The previous prime is 2157235259. The next prime is 2157235279. The reversal of 2157235277 is 7725327512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2157235277 - 2¹⁰ = 2157234253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157235279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646349 + ... + 649677.

It is an arithmetic number, because the mean of its divisors is an integer number (270449280).

Almost surely, 2^2157235277 is an apocalyptic number.

It is an amenable number.

2157235277 is a deficient number, since it is larger than the sum of its proper divisors (6358963).

2157235277 is a wasteful number, since it uses less digits than its factorization.

2157235277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043.

The product of its digits is 205800, while the sum is 41.

The square root of 2157235277 is about 46446.0469469685. The cubic root of 2157235277 is about 1292.1090586227.

It can be divided in two parts, 2157235 and 277, that added together give a palindrome (2157512).

The spelling of 2157235277 in words is "two billion, one hundred fifty-seven million, two hundred thirty-five thousand, two hundred seventy-seven".