85222421 has 8 divisors (see below), whose sum is σ = 87212160. Its totient is φ = 83240128.

The previous prime is 85222399. The next prime is 85222439. The reversal of 85222421 is 12422258.

85222421 is nontrivially palindromic in base 16.

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-85222421 is a prime.

It is a super-2 number, since 2×85222421² = 14525722082202482, which contains 22 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 (85222451) 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, 26045 + ... + 29133.

It is an arithmetic number, because the mean of its divisors is an integer number (10901520).

Almost surely, 2^85222421 is an apocalyptic number.

It is an amenable number.

85222421 is a deficient number, since it is larger than the sum of its proper divisors (1989739).

85222421 is a wasteful number, since it uses less digits than its factorization.

85222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723.

The product of its digits is 2560, while the sum is 26.

The square root of 85222421 is about 9231.5990489189. The cubic root of 85222421 is about 440.0661419164.

Adding to 85222421 its reverse (12422258), we get a palindrome (97644679).

The spelling of 85222421 in words is "eighty-five million, two hundred twenty-two thousand, four hundred twenty-one".