85401571 has 2 divisors, whose sum is σ = 85401572. Its totient is φ = 85401570.

The previous prime is 85401551. The next prime is 85401577. The reversal of 85401571 is 17510458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85401571 - 2⁵ = 85401539 is a prime.

It is not a weakly prime, because it can be changed into another prime (85401577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42700785 + 42700786.

It is an arithmetic number, because the mean of its divisors is an integer number (42700786).

Almost surely, 2^85401571 is an apocalyptic number.

85401571 is a deficient number, since it is larger than the sum of its proper divisors (1).

85401571 is an equidigital number, since it uses as much as digits as its factorization.

85401571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 85401571 is about 9241.2970410003. The cubic root of 85401571 is about 440.3742872375.

The spelling of 85401571 in words is "eighty-five million, four hundred one thousand, five hundred seventy-one".