55309249 has 8 divisors (see below), whose sum is σ = 56768192. Its totient is φ = 53868240.

The previous prime is 55309217. The next prime is 55309277. The reversal of 55309249 is 94290355.

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

It is a cyclic number.

It is not a de Polignac number, because 55309249 - 2⁵ = 55309217 is a prime.

It is a super-2 number, since 2×55309249² = 6118226049888002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55309349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1882 + ... + 10684.

It is an arithmetic number, because the mean of its divisors is an integer number (7096024).

Almost surely, 2^55309249 is an apocalyptic number.

It is an amenable number.

55309249 is a deficient number, since it is larger than the sum of its proper divisors (1458943).

55309249 is a wasteful number, since it uses less digits than its factorization.

55309249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8967.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 55309249 is about 7437.0188247711. The cubic root of 55309249 is about 381.0066775260.

The spelling of 55309249 in words is "fifty-five million, three hundred nine thousand, two hundred forty-nine".