28547475431 has 2 divisors, whose sum is σ = 28547475432. Its totient is φ = 28547475430.

The previous prime is 28547475427. The next prime is 28547475469. The reversal of 28547475431 is 13457474582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28547475431 - 2² = 28547475427 is a prime.

It is a super-2 number, since 2×28547475431² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28547475431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28547435431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14273737715 + 14273737716.

It is an arithmetic number, because the mean of its divisors is an integer number (14273737716).

Almost surely, 2^28547475431 is an apocalyptic number.

28547475431 is a deficient number, since it is larger than the sum of its proper divisors (1).

28547475431 is an equidigital number, since it uses as much as digits as its factorization.

28547475431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3763200, while the sum is 50.

The spelling of 28547475431 in words is "twenty-eight billion, five hundred forty-seven million, four hundred seventy-five thousand, four hundred thirty-one".