87277281 has 48 divisors (see below), whose sum is σ = 147470400. Its totient is φ = 45505152.

The previous prime is 87277277. The next prime is 87277283. The reversal of 87277281 is 18277278.

It is not a de Polignac number, because 87277281 - 2² = 87277277 is a prime.

It is a super-2 number, since 2×87277281² = 15234647557505922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87277283) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 208090 + ... + 208508.

It is an arithmetic number, because the mean of its divisors is an integer number (3072300).

Almost surely, 2^87277281 is an apocalyptic number.

It is an amenable number.

87277281 is a deficient number, since it is larger than the sum of its proper divisors (60193119).

87277281 is a wasteful number, since it uses less digits than its factorization.

87277281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 551 counting only the distinct ones).

The product of its digits is 87808, while the sum is 42.

The square root of 87277281 is about 9342.2310504504. The cubic root of 87277281 is about 443.5750082745.

The spelling of 87277281 in words is "eighty-seven million, two hundred seventy-seven thousand, two hundred eighty-one".