87211270 has 16 divisors (see below), whose sum is σ = 157137408. Its totient is φ = 34849600.

The previous prime is 87211249. The next prime is 87211279. The reversal of 87211270 is 7211278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87211279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7722 + ... + 15298.

It is an arithmetic number, because the mean of its divisors is an integer number (9821088).

Almost surely, 2^87211270 is an apocalyptic number.

87211270 is a deficient number, since it is larger than the sum of its proper divisors (69926138).

87211270 is a wasteful number, since it uses less digits than its factorization.

87211270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8735.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 87211270 is about 9338.6974466464. The cubic root of 87211270 is about 443.4631494009.

The spelling of 87211270 in words is "eighty-seven million, two hundred eleven thousand, two hundred seventy".