85344251 has 2 divisors, whose sum is σ = 85344252. Its totient is φ = 85344250.

The previous prime is 85344241. The next prime is 85344317. The reversal of 85344251 is 15244358.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85344251 - 2¹⁰ = 85343227 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85344221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42672125 + 42672126.

It is an arithmetic number, because the mean of its divisors is an integer number (42672126).

Almost surely, 2^85344251 is an apocalyptic number.

85344251 is a deficient number, since it is larger than the sum of its proper divisors (1).

85344251 is an equidigital number, since it uses as much as digits as its factorization.

85344251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 32.

The square root of 85344251 is about 9238.1952241766. The cubic root of 85344251 is about 440.2757414171.

The spelling of 85344251 in words is "eighty-five million, three hundred forty-four thousand, two hundred fifty-one".