85101821 has 8 divisors (see below), whose sum is σ = 97329024. Its totient is φ = 72892080.

The previous prime is 85101799. The next prime is 85101823. The reversal of 85101821 is 12810158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85101821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85101823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8696 + ... + 15678.

It is an arithmetic number, because the mean of its divisors is an integer number (12166128).

Almost surely, 2^85101821 is an apocalyptic number.

It is an amenable number.

85101821 is a deficient number, since it is larger than the sum of its proper divisors (12227203).

85101821 is a wasteful number, since it uses less digits than its factorization.

85101821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8731.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 85101821 is about 9225.0648236205. The cubic root of 85101821 is about 439.8584617065.

Adding to 85101821 its reverse (12810158), we get a palindrome (97911979).

The spelling of 85101821 in words is "eighty-five million, one hundred one thousand, eight hundred twenty-one".