85451213 has 4 divisors (see below), whose sum is σ = 85470528. Its totient is φ = 85431900.

The previous prime is 85451209. The next prime is 85451237. The reversal of 85451213 is 31215458.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31215458 = 2 ⋅15607729.

It is a cyclic number.

It is not a de Polignac number, because 85451213 - 2² = 85451209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85451263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638 + ... + 13088.

It is an arithmetic number, because the mean of its divisors is an integer number (21367632).

Almost surely, 2^85451213 is an apocalyptic number.

It is an amenable number.

85451213 is a deficient number, since it is larger than the sum of its proper divisors (19315).

85451213 is a wasteful number, since it uses less digits than its factorization.

85451213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19314.

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

The square root of 85451213 is about 9243.9825291916. The cubic root of 85451213 is about 440.4595972449.

The spelling of 85451213 in words is "eighty-five million, four hundred fifty-one thousand, two hundred thirteen".