55290747 has 4 divisors (see below), whose sum is σ = 73721000. Its totient is φ = 36860496.

The previous prime is 55290731. The next prime is 55290751. The reversal of 55290747 is 74709255.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55290747 - 2⁴ = 55290731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55290797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9215122 + ... + 9215127.

It is an arithmetic number, because the mean of its divisors is an integer number (18430250).

Almost surely, 2^55290747 is an apocalyptic number.

55290747 is a deficient number, since it is larger than the sum of its proper divisors (18430253).

55290747 is a wasteful number, since it uses less digits than its factorization.

55290747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18430252.

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 55290747 is about 7435.7748083169. The cubic root of 55290747 is about 380.9641881179.

The spelling of 55290747 in words is "fifty-five million, two hundred ninety thousand, seven hundred forty-seven".