28531214831 has 8 divisors (see below), whose sum is σ = 32814792480. Its totient is φ = 24299559648.

The previous prime is 28531214779. The next prime is 28531214843. The reversal of 28531214831 is 13841213582.

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

It is not a de Polignac number, because 28531214831 - 2³⁴ = 11351345647 is a prime.

It is a super-2 number, since 2×28531214831² (a number of 22 digits) 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 (28531214431) 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, 12979436 + ... + 12981633.

It is an arithmetic number, because the mean of its divisors is an integer number (4101849060).

Almost surely, 2^28531214831 is an apocalyptic number.

28531214831 is a deficient number, since it is larger than the sum of its proper divisors (4283577649).

28531214831 is a wasteful number, since it uses less digits than its factorization.

28531214831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25961233.

The product of its digits is 46080, while the sum is 38.

The spelling of 28531214831 in words is "twenty-eight billion, five hundred thirty-one million, two hundred fourteen thousand, eight hundred thirty-one".