88220557 has 4 divisors (see below), whose sum is σ = 88599420. Its totient is φ = 87841696.

The previous prime is 88220549. The next prime is 88220593. The reversal of 88220557 is 75502288.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43744996 + 44475561 = 6614^2 + 6669^2 .

It is a cyclic number.

It is not a de Polignac number, because 88220557 - 2³ = 88220549 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 (88220507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189082 + ... + 189547.

It is an arithmetic number, because the mean of its divisors is an integer number (22149855).

Almost surely, 2^88220557 is an apocalyptic number.

It is an amenable number.

88220557 is a deficient number, since it is larger than the sum of its proper divisors (378863).

88220557 is a wasteful number, since it uses less digits than its factorization.

88220557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378862.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 88220557 is about 9392.5798905306. The cubic root of 88220557 is about 445.1673098939.

The spelling of 88220557 in words is "eighty-eight million, two hundred twenty thousand, five hundred fifty-seven".