86251551 has 8 divisors (see below), whose sum is σ = 118110384. Its totient is φ = 55946880.

The previous prime is 86251549. The next prime is 86251559. The reversal of 86251551 is 15515268.

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

It is not a de Polignac number, because 86251551 - 2¹ = 86251549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86251559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388410 + ... + 388631.

It is an arithmetic number, because the mean of its divisors is an integer number (14763798).

Almost surely, 2^86251551 is an apocalyptic number.

86251551 is a deficient number, since it is larger than the sum of its proper divisors (31858833).

86251551 is a wasteful number, since it uses less digits than its factorization.

86251551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777081.

The product of its digits is 12000, while the sum is 33.

The square root of 86251551 is about 9287.1713131610. The cubic root of 86251551 is about 441.8304445098.

The spelling of 86251551 in words is "eighty-six million, two hundred fifty-one thousand, five hundred fifty-one".