27220509 has 16 divisors (see below), whose sum is σ = 40622400. Its totient is φ = 18013968.

The previous prime is 27220507. The next prime is 27220517. The reversal of 27220509 is 90502272.

It is a happy number.

It is not a de Polignac number, because 27220509 - 2¹ = 27220507 is a prime.

It is a super-2 number, since 2×27220509² = 1481912220438162, 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 (27220507) 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, 127 + ... + 7379.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^27220509 is an apocalyptic number.

It is an amenable number.

27220509 is a deficient number, since it is larger than the sum of its proper divisors (13401891).

27220509 is a wasteful number, since it uses less digits than its factorization.

27220509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7401 (or 7395 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 27220509 is about 5217.3277642870. The cubic root of 27220509 is about 300.8144867035.

The spelling of 27220509 in words is "twenty-seven million, two hundred twenty thousand, five hundred nine".