86370221 has 8 divisors (see below), whose sum is σ = 103000704. Its totient is φ = 70812720.

The previous prime is 86370211. The next prime is 86370227. The reversal of 86370221 is 12207368.

86370221 = 349² + 350² + ... + 670².

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 86370221 - 2⁶ = 86370157 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 (86370227) 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, 268070 + ... + 268391.

It is an arithmetic number, because the mean of its divisors is an integer number (12875088).

Almost surely, 2^86370221 is an apocalyptic number.

It is an amenable number.

86370221 is a deficient number, since it is larger than the sum of its proper divisors (16630483).

86370221 is a wasteful number, since it uses less digits than its factorization.

86370221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536491.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 86370221 is about 9293.5580376947. The cubic root of 86370221 is about 442.0329838274.

Adding to 86370221 its reverse (12207368), we get a palindrome (98577589).

The spelling of 86370221 in words is "eighty-six million, three hundred seventy thousand, two hundred twenty-one".