2157270807 has 16 divisors (see below), whose sum is σ = 2895768288. Its totient is φ = 1428510720.

The previous prime is 2157270793. The next prime is 2157270833. The reversal of 2157270807 is 7080727512.

It is not a de Polignac number, because 2157270807 - 2¹⁹ = 2156746519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157270877) 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, 271207 + ... + 279047.

It is an arithmetic number, because the mean of its divisors is an integer number (180985518).

Almost surely, 2^2157270807 is an apocalyptic number.

2157270807 is a deficient number, since it is larger than the sum of its proper divisors (738497481).

2157270807 is a wasteful number, since it uses less digits than its factorization.

2157270807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8450.

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 2157270807 is about 46446.4294321964. The cubic root of 2157270807 is about 1292.1161523294.

The spelling of 2157270807 in words is "two billion, one hundred fifty-seven million, two hundred seventy thousand, eight hundred seven".