228615791831 has 8 divisors (see below), whose sum is σ = 261373472640. Its totient is φ = 195882681528.

The previous prime is 228615791809. The next prime is 228615791861. The reversal of 228615791831 is 138197516822.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228615791831 is a prime.

It is a super-2 number, since 2×228615791831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228615791861) 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, 6122681 + ... + 6159906.

It is an arithmetic number, because the mean of its divisors is an integer number (32671684080).

Almost surely, 2^228615791831 is an apocalyptic number.

228615791831 is a deficient number, since it is larger than the sum of its proper divisors (32757680809).

228615791831 is a wasteful number, since it uses less digits than its factorization.

228615791831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12285253.

The product of its digits is 1451520, while the sum is 53.

The spelling of 228615791831 in words is "two hundred twenty-eight billion, six hundred fifteen million, seven hundred ninety-one thousand, eight hundred thirty-one".