6857563231 has 4 divisors (see below), whose sum is σ = 6863312592. Its totient is φ = 6851813872.

The previous prime is 6857563217. The next prime is 6857563243. The reversal of 6857563231 is 1323657586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323657586 = 2 ⋅661828793.

It is a cyclic number.

It is not a de Polignac number, because 6857563231 - 2¹³ = 6857555039 is a prime.

It is a super-2 number, since 2×6857563231² = 94052346934326318722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857563291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2872891 + ... + 2875276.

It is an arithmetic number, because the mean of its divisors is an integer number (1715828148).

Almost surely, 2^6857563231 is an apocalyptic number.

6857563231 is a deficient number, since it is larger than the sum of its proper divisors (5749361).

6857563231 is a wasteful number, since it uses less digits than its factorization.

6857563231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5749360.

The product of its digits is 907200, while the sum is 46.

The square root of 6857563231 is about 82810.4053304897. The cubic root of 6857563231 is about 1899.8673250847.

The spelling of 6857563231 in words is "six billion, eight hundred fifty-seven million, five hundred sixty-three thousand, two hundred thirty-one".