22155501 has 8 divisors (see below), whose sum is σ = 31095520. Its totient is φ = 13992912.

The previous prime is 22155491. The next prime is 22155547. The reversal of 22155501 is 10555122.

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

It is not a de Polignac number, because 22155501 - 2⁷ = 22155373 is a prime.

It is a super-2 number, since 2×22155501² = 981732449122002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155701) 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 7 ways as a sum of consecutive naturals, for example, 194290 + ... + 194403.

It is an arithmetic number, because the mean of its divisors is an integer number (3886940).

Almost surely, 2^22155501 is an apocalyptic number.

It is an amenable number.

22155501 is a deficient number, since it is larger than the sum of its proper divisors (8940019).

22155501 is a wasteful number, since it uses less digits than its factorization.

22155501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388715.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 22155501 is about 4706.9630336343. The cubic root of 22155501 is about 280.8625654006.

The spelling of 22155501 in words is "twenty-two million, one hundred fifty-five thousand, five hundred one".