85072471 has 16 divisors (see below), whose sum is σ = 98903808. Its totient is φ = 72316800.

The previous prime is 85072459. The next prime is 85072483. The reversal of 85072471 is 17427058.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85072459) and next prime (85072483).

It is a cyclic number.

It is not a de Polignac number, because 85072471 - 2⁵ = 85072439 is a prime.

It is a super-3 number, since 3×85072471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85072451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29086 + ... + 31876.

It is an arithmetic number, because the mean of its divisors is an integer number (6181488).

Almost surely, 2^85072471 is an apocalyptic number.

85072471 is a deficient number, since it is larger than the sum of its proper divisors (13831337).

85072471 is a wasteful number, since it uses less digits than its factorization.

85072471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 85072471 is about 9223.4739117103. The cubic root of 85072471 is about 439.8078896189.

The spelling of 85072471 in words is "eighty-five million, seventy-two thousand, four hundred seventy-one".