87231775 has 12 divisors (see below), whose sum is σ = 108354672. Its totient is φ = 69664640.

The previous prime is 87231773. The next prime is 87231791. The reversal of 87231775 is 57713278.

It is not a de Polignac number, because 87231775 - 2¹ = 87231773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87231773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13479 + ... + 18871.

It is an arithmetic number, because the mean of its divisors is an integer number (9029556).

Almost surely, 2^87231775 is an apocalyptic number.

87231775 is a deficient number, since it is larger than the sum of its proper divisors (21122897).

87231775 is a wasteful number, since it uses less digits than its factorization.

87231775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6050 (or 6045 counting only the distinct ones).

The product of its digits is 82320, while the sum is 40.

The square root of 87231775 is about 9339.7952333014. The cubic root of 87231775 is about 443.4979021698.

It can be divided in two parts, 87 and 231775, that multiplied together give a triangular number (20164425 = T₆₃₅₀).

The spelling of 87231775 in words is "eighty-seven million, two hundred thirty-one thousand, seven hundred seventy-five".