88121815 has 8 divisors (see below), whose sum is σ = 105922368. Its totient is φ = 70380000.

The previous prime is 88121797. The next prime is 88121819. The reversal of 88121815 is 51812188.

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

It is not a de Polignac number, because 88121815 - 2⁵ = 88121783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88121819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11311 + ... + 17440.

It is an arithmetic number, because the mean of its divisors is an integer number (13240296).

Almost surely, 2^88121815 is an apocalyptic number.

88121815 is a deficient number, since it is larger than the sum of its proper divisors (17800553).

88121815 is a wasteful number, since it uses less digits than its factorization.

88121815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29369.

The product of its digits is 5120, while the sum is 34.

The square root of 88121815 is about 9387.3220355967. The cubic root of 88121815 is about 445.0011614665.

The spelling of 88121815 in words is "eighty-eight million, one hundred twenty-one thousand, eight hundred fifteen".