28330231001131 has 4 divisors (see below), whose sum is σ = 28332218962264. Its totient is φ = 28328243040000.

The previous prime is 28330231001099. The next prime is 28330231001143. The reversal of 28330231001131 is 13110013203382.

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

It is a cyclic number.

It is not a de Polignac number, because 28330231001131 - 2⁵ = 28330231001099 is a prime.

It is a super-2 number, since 2×28330231001131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28330231001131.

It is not an unprimeable number, because it can be changed into a prime (28330231031131) 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, 993959190 + ... + 993987691.

It is an arithmetic number, because the mean of its divisors is an integer number (7083054740566).

Almost surely, 2^{28330231001131} is an apocalyptic number.

28330231001131 is a deficient number, since it is larger than the sum of its proper divisors (1987961133).

28330231001131 is a wasteful number, since it uses less digits than its factorization.

28330231001131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987961132.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 28330231001131 in words is "twenty-eight trillion, three hundred thirty billion, two hundred thirty-one million, one thousand, one hundred thirty-one".