84521248831 has 2 divisors, whose sum is σ = 84521248832. Its totient is φ = 84521248830.

The previous prime is 84521248759. The next prime is 84521248841. The reversal of 84521248831 is 13884212548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84521248831 - 2²⁷ = 84387031103 is a prime.

It is a super-2 number, since 2×84521248831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84521248841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42260624415 + 42260624416.

It is an arithmetic number, because the mean of its divisors is an integer number (42260624416).

Almost surely, 2^84521248831 is an apocalyptic number.

84521248831 is a deficient number, since it is larger than the sum of its proper divisors (1).

84521248831 is an equidigital number, since it uses as much as digits as its factorization.

84521248831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 491520, while the sum is 46.

The spelling of 84521248831 in words is "eighty-four billion, five hundred twenty-one million, two hundred forty-eight thousand, eight hundred thirty-one".