87251611 has 2 divisors, whose sum is σ = 87251612. Its totient is φ = 87251610.

The previous prime is 87251603. The next prime is 87251617. The reversal of 87251611 is 11615278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87251611 - 2³ = 87251603 is a prime.

It is a super-2 number, since 2×87251611² = 15225687244190642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87251617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43625805 + 43625806.

It is an arithmetic number, because the mean of its divisors is an integer number (43625806).

Almost surely, 2^87251611 is an apocalyptic number.

87251611 is a deficient number, since it is larger than the sum of its proper divisors (1).

87251611 is an equidigital number, since it uses as much as digits as its factorization.

87251611 is an odious number, because the sum of its binary digits is odd.

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

The square root of 87251611 is about 9340.8570805896. The cubic root of 87251611 is about 443.5315159061.

Adding to 87251611 its reverse (11615278), we get a palindrome (98866889).

The spelling of 87251611 in words is "eighty-seven million, two hundred fifty-one thousand, six hundred eleven".