85215307 has 4 divisors (see below), whose sum is σ = 85428216. Its totient is φ = 85002400.

The previous prime is 85215301. The next prime is 85215313. The reversal of 85215307 is 70351258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70351258 = 2 ⋅35175629.

It is an interprime number because it is at equal distance from previous prime (85215301) and next prime (85215313).

It is a cyclic number.

It is not a de Polignac number, because 85215307 - 2¹¹ = 85213259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85215301) 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, 105853 + ... + 106654.

It is an arithmetic number, because the mean of its divisors is an integer number (21357054).

Almost surely, 2^85215307 is an apocalyptic number.

85215307 is a deficient number, since it is larger than the sum of its proper divisors (212909).

85215307 is a wasteful number, since it uses less digits than its factorization.

85215307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212908.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 85215307 is about 9231.2137338489. The cubic root of 85215307 is about 440.0538966347.

The spelling of 85215307 in words is "eighty-five million, two hundred fifteen thousand, three hundred seven".