87218455 has 8 divisors (see below), whose sum is σ = 110170800. Its totient is φ = 66102336.

The previous prime is 87218419. The next prime is 87218473. The reversal of 87218455 is 55481278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87218455 - 2⁹ = 87217943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458950 + ... + 459139.

It is an arithmetic number, because the mean of its divisors is an integer number (13771350).

Almost surely, 2^87218455 is an apocalyptic number.

87218455 is a deficient number, since it is larger than the sum of its proper divisors (22952345).

87218455 is a wasteful number, since it uses less digits than its factorization.

87218455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918113.

The product of its digits is 89600, while the sum is 40.

The square root of 87218455 is about 9339.0821283464. The cubic root of 87218455 is about 443.4753274724.

The spelling of 87218455 in words is "eighty-seven million, two hundred eighteen thousand, four hundred fifty-five".