55249647 has 8 divisors (see below), whose sum is σ = 74161200. Its totient is φ = 36585600.

The previous prime is 55249639. The next prime is 55249651. The reversal of 55249647 is 74694255.

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

It is not a de Polignac number, because 55249647 - 2³ = 55249639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55249599 and 55249608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55249627) 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, 61354 + ... + 62247.

It is an arithmetic number, because the mean of its divisors is an integer number (9270150).

Almost surely, 2^55249647 is an apocalyptic number.

55249647 is a deficient number, since it is larger than the sum of its proper divisors (18911553).

55249647 is a wasteful number, since it uses less digits than its factorization.

55249647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123753.

The product of its digits is 302400, while the sum is 42.

The square root of 55249647 is about 7433.0106282717. The cubic root of 55249647 is about 380.8697690077.

The spelling of 55249647 in words is "fifty-five million, two hundred forty-nine thousand, six hundred forty-seven".