28548405101231 has 4 divisors (see below), whose sum is σ = 28667854495200. Its totient is φ = 28428955707264.

The previous prime is 28548405101207. The next prime is 28548405101297. The reversal of 28548405101231 is 13210150484582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28548405101231 is a prime.

It is a super-2 number, since 2×28548405101231² (a number of 28 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 (28548485101231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59724696626 + ... + 59724697103.

It is an arithmetic number, because the mean of its divisors is an integer number (7166963623800).

Almost surely, 2^{28548405101231} is an apocalyptic number.

28548405101231 is a deficient number, since it is larger than the sum of its proper divisors (119449393969).

28548405101231 is a wasteful number, since it uses less digits than its factorization.

28548405101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119449393968.

The product of its (nonzero) digits is 307200, while the sum is 44.

The spelling of 28548405101231 in words is "twenty-eight trillion, five hundred forty-eight billion, four hundred five million, one hundred one thousand, two hundred thirty-one".