55272609 has 12 divisors (see below), whose sum is σ = 91243776. Its totient is φ = 31584312.

The previous prime is 55272601. The next prime is 55272617. The reversal of 55272609 is 90627255.

It is an interprime number because it is at equal distance from previous prime (55272601) and next prime (55272617).

It is not a de Polignac number, because 55272609 - 2³ = 55272601 is a prime.

It is a super-2 number, since 2×55272609² = 6110122611333762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55272601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438609 + ... + 438734.

It is an arithmetic number, because the mean of its divisors is an integer number (7603648).

Almost surely, 2^55272609 is an apocalyptic number.

It is an amenable number.

55272609 is a deficient number, since it is larger than the sum of its proper divisors (35971167).

55272609 is a wasteful number, since it uses less digits than its factorization.

55272609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877356 (or 877353 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 55272609 is about 7434.5550640237. Note that the first 3 decimals coincide. The cubic root of 55272609 is about 380.9225254254.

The spelling of 55272609 in words is "fifty-five million, two hundred seventy-two thousand, six hundred nine".