88501221 has 16 divisors (see below), whose sum is σ = 138014400. Its totient is φ = 55895184.

The previous prime is 88501213. The next prime is 88501241. The reversal of 88501221 is 12210588.

It is not a de Polignac number, because 88501221 - 2³ = 88501213 is a prime.

It is a super-2 number, since 2×88501221² = 15664932236981682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88501241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85746 + ... + 86771.

It is an arithmetic number, because the mean of its divisors is an integer number (8625900).

Almost surely, 2^88501221 is an apocalyptic number.

It is an amenable number.

88501221 is a deficient number, since it is larger than the sum of its proper divisors (49513179).

88501221 is a wasteful number, since it uses less digits than its factorization.

88501221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172545 (or 172539 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 88501221 is about 9407.5087563074. The cubic root of 88501221 is about 445.6388937624.

The spelling of 88501221 in words is "eighty-eight million, five hundred one thousand, two hundred twenty-one".