28573191631 has 2 divisors, whose sum is σ = 28573191632. Its totient is φ = 28573191630.

The previous prime is 28573191623. The next prime is 28573191637. The reversal of 28573191631 is 13619137582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28573191631 - 2³ = 28573191623 is a prime.

It is a super-2 number, since 2×28573191631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28573191637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286595815 + 14286595816.

It is an arithmetic number, because the mean of its divisors is an integer number (14286595816).

Almost surely, 2^28573191631 is an apocalyptic number.

28573191631 is a deficient number, since it is larger than the sum of its proper divisors (1).

28573191631 is an equidigital number, since it uses as much as digits as its factorization.

28573191631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The spelling of 28573191631 in words is "twenty-eight billion, five hundred seventy-three million, one hundred ninety-one thousand, six hundred thirty-one".