87215763 has 16 divisors (see below), whose sum is σ = 124692480. Its totient is φ = 54028416.

The previous prime is 87215759. The next prime is 87215783. The reversal of 87215763 is 36751278.

It is not a de Polignac number, because 87215763 - 2² = 87215759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87215743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6795 + ... + 14852.

It is an arithmetic number, because the mean of its divisors is an integer number (7793280).

Almost surely, 2^87215763 is an apocalyptic number.

87215763 is a deficient number, since it is larger than the sum of its proper divisors (37476717).

87215763 is a wasteful number, since it uses less digits than its factorization.

87215763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21746.

The product of its digits is 70560, while the sum is 39.

The square root of 87215763 is about 9338.9380017216. The cubic root of 87215763 is about 443.4707647994.

It can be divided in two parts, 87215 and 763, that added together give a palindrome (87978).

The spelling of 87215763 in words is "eighty-seven million, two hundred fifteen thousand, seven hundred sixty-three".