85513421 has 4 divisors (see below), whose sum is σ = 97729632. Its totient is φ = 73297212.

The previous prime is 85513411. The next prime is 85513423. The reversal of 85513421 is 12431558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85513421 - 2¹⁴ = 85497037 is a prime.

It is a super-2 number, since 2×85513421² = 14625090342246482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85513423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6108095 + ... + 6108108.

It is an arithmetic number, because the mean of its divisors is an integer number (24432408).

Almost surely, 2^85513421 is an apocalyptic number.

It is an amenable number.

85513421 is a deficient number, since it is larger than the sum of its proper divisors (12216211).

85513421 is a wasteful number, since it uses less digits than its factorization.

85513421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12216210.

The product of its digits is 4800, while the sum is 29.

The square root of 85513421 is about 9247.3467005406. The cubic root of 85513421 is about 440.5664553506.

Adding to 85513421 its reverse (12431558), we get a palindrome (97944979).

The spelling of 85513421 in words is "eighty-five million, five hundred thirteen thousand, four hundred twenty-one".