88216507 has 4 divisors (see below), whose sum is σ = 88235680. Its totient is φ = 88197336.

The previous prime is 88216439. The next prime is 88216511. The reversal of 88216507 is 70561288.

It is a semiprime because it is the product of two primes.

It is a 3-Lehmer number, since φ(88216507) divides (88216507-1)³.

It is a cyclic number.

It is not a de Polignac number, because 88216507 - 2¹⁹ = 87692219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88216517) 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 3 ways as a sum of consecutive naturals, for example, 1918 + ... + 13420.

It is an arithmetic number, because the mean of its divisors is an integer number (22058920).

Almost surely, 2^88216507 is an apocalyptic number.

88216507 is the 7669-th pentagonal number.

88216507 is a deficient number, since it is larger than the sum of its proper divisors (19173).

88216507 is a wasteful number, since it uses less digits than its factorization.

88216507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19172.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 88216507 is about 9392.3642923388. The cubic root of 88216507 is about 445.1604975920.

The spelling of 88216507 in words is "eighty-eight million, two hundred sixteen thousand, five hundred seven".