28133350531 has 16 divisors (see below), whose sum is σ = 33304094208. Its totient is φ = 23428173600.

The previous prime is 28133350513. The next prime is 28133350549. The reversal of 28133350531 is 13505333182.

It is an interprime number because it is at equal distance from previous prime (28133350513) and next prime (28133350549).

It is not a de Polignac number, because 28133350531 - 2¹³ = 28133342339 is a prime.

It is a super-2 number, since 2×28133350531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28133350501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732171 + ... + 769636.

It is an arithmetic number, because the mean of its divisors is an integer number (2081505888).

Almost surely, 2^28133350531 is an apocalyptic number.

28133350531 is a deficient number, since it is larger than the sum of its proper divisors (5170743677).

28133350531 is a wasteful number, since it uses less digits than its factorization.

28133350531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501962.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 28133350531 in words is "twenty-eight billion, one hundred thirty-three million, three hundred fifty thousand, five hundred thirty-one".