84543557 has 16 divisors (see below), whose sum is σ = 99590400. Its totient is φ = 70253568.

The previous prime is 84543539. The next prime is 84543581. The reversal of 84543557 is 75534548.

It is not a de Polignac number, because 84543557 - 2¹⁶ = 84478021 is a prime.

It is a super-2 number, since 2×84543557² = 14295226060424498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84543157) 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, 115928 + ... + 116654.

It is an arithmetic number, because the mean of its divisors is an integer number (6224400).

Almost surely, 2^84543557 is an apocalyptic number.

It is an amenable number.

84543557 is a deficient number, since it is larger than the sum of its proper divisors (15046843).

84543557 is a wasteful number, since it uses less digits than its factorization.

84543557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its digits is 336000, while the sum is 41.

The square root of 84543557 is about 9194.7570386607. The cubic root of 84543557 is about 438.8945338114.

Subtracting from 84543557 its reverse (75534548), we obtain a palindrome (9009009).

The spelling of 84543557 in words is "eighty-four million, five hundred forty-three thousand, five hundred fifty-seven".