87051812 has 6 divisors (see below), whose sum is σ = 152340678. Its totient is φ = 43525904.

The previous prime is 87051793. The next prime is 87051821. The reversal of 87051812 is 21815078.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 85673536 + 1378276 = 9256^2 + 1174^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10881473 + ... + 10881480.

It is an arithmetic number, because the mean of its divisors is an integer number (25390113).

Almost surely, 2^87051812 is an apocalyptic number.

It is an amenable number.

87051812 is a deficient number, since it is larger than the sum of its proper divisors (65288866).

87051812 is a wasteful number, since it uses less digits than its factorization.

87051812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21762957 (or 21762955 counting only the distinct ones).

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

The square root of 87051812 is about 9330.1560544291. The cubic root of 87051812 is about 443.1927069508.

The spelling of 87051812 in words is "eighty-seven million, fifty-one thousand, eight hundred twelve".