85477481 has 2 divisors, whose sum is σ = 85477482. Its totient is φ = 85477480.

The previous prime is 85477433. The next prime is 85477487. The reversal of 85477481 is 18477458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 3031081 = 9080^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 85477481 - 2¹⁸ = 85215337 is a prime.

It is a super-2 number, since 2×85477481² = 14612799516210722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85477487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42738740 + 42738741.

It is an arithmetic number, because the mean of its divisors is an integer number (42738741).

Almost surely, 2^85477481 is an apocalyptic number.

It is an amenable number.

85477481 is a deficient number, since it is larger than the sum of its proper divisors (1).

85477481 is an equidigital number, since it uses as much as digits as its factorization.

85477481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250880, while the sum is 44.

The square root of 85477481 is about 9245.4032362034. The cubic root of 85477481 is about 440.5047255582.

It can be divided in two parts, 85477 and 481, that added together give a palindrome (85958).

The spelling of 85477481 in words is "eighty-five million, four hundred seventy-seven thousand, four hundred eighty-one".