87280511 has 2 divisors, whose sum is σ = 87280512. Its totient is φ = 87280510.

The previous prime is 87280507. The next prime is 87280537. The reversal of 87280511 is 11508278.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87280511 - 2² = 87280507 is a prime.

It is a super-2 number, since 2×87280511² = 15235775200842242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87280591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43640255 + 43640256.

It is an arithmetic number, because the mean of its divisors is an integer number (43640256).

Almost surely, 2^87280511 is an apocalyptic number.

87280511 is a deficient number, since it is larger than the sum of its proper divisors (1).

87280511 is an equidigital number, since it uses as much as digits as its factorization.

87280511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 87280511 is about 9342.4039197628. The cubic root of 87280511 is about 443.5804802201.

Adding to 87280511 its reverse (11508278), we get a palindrome (98788789).

The spelling of 87280511 in words is "eighty-seven million, two hundred eighty thousand, five hundred eleven".