86205251 has 4 divisors (see below), whose sum is σ = 94042104. Its totient is φ = 78368400.

The previous prime is 86205241. The next prime is 86205263. The reversal of 86205251 is 15250268.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 86205251 - 2¹⁰ = 86204227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86205221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3918410 + ... + 3918431.

It is an arithmetic number, because the mean of its divisors is an integer number (23510526).

Almost surely, 2^86205251 is an apocalyptic number.

86205251 is a deficient number, since it is larger than the sum of its proper divisors (7836853).

86205251 is a wasteful number, since it uses less digits than its factorization.

86205251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836852.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 86205251 is about 9284.6782927574. The cubic root of 86205251 is about 441.7513718792.

The spelling of 86205251 in words is "eighty-six million, two hundred five thousand, two hundred fifty-one".