85256651 has 2 divisors, whose sum is σ = 85256652. Its totient is φ = 85256650.

The previous prime is 85256617. The next prime is 85256681. The reversal of 85256651 is 15665258.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85256651 is a prime.

It is not a weakly prime, because it can be changed into another prime (85256681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42628325 + 42628326.

It is an arithmetic number, because the mean of its divisors is an integer number (42628326).

Almost surely, 2^85256651 is an apocalyptic number.

85256651 is a deficient number, since it is larger than the sum of its proper divisors (1).

85256651 is an equidigital number, since it uses as much as digits as its factorization.

85256651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 38.

The square root of 85256651 is about 9233.4528211282. The cubic root of 85256651 is about 440.1250522655.

The spelling of 85256651 in words is "eighty-five million, two hundred fifty-six thousand, six hundred fifty-one".