86211157 has 2 divisors, whose sum is σ = 86211158. Its totient is φ = 86211156.

The previous prime is 86211121. The next prime is 86211163. The reversal of 86211157 is 75111268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65060356 + 21150801 = 8066^2 + 4599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86211157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86211197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43105578 + 43105579.

It is an arithmetic number, because the mean of its divisors is an integer number (43105579).

Almost surely, 2^86211157 is an apocalyptic number.

It is an amenable number.

86211157 is a deficient number, since it is larger than the sum of its proper divisors (1).

86211157 is an equidigital number, since it uses as much as digits as its factorization.

86211157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 31.

The square root of 86211157 is about 9284.9963381791. The cubic root of 86211157 is about 441.7614599113.

It can be divided in two parts, 86211 and 157, that added together give a palindrome (86368).

The spelling of 86211157 in words is "eighty-six million, two hundred eleven thousand, one hundred fifty-seven".