55045390 has 24 divisors (see below), whose sum is σ = 100298520. Its totient is φ = 21749904.

The previous prime is 55045387. The next prime is 55045409. The reversal of 55045390 is 9354055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276511 + ... + 276709.

It is an arithmetic number, because the mean of its divisors is an integer number (4179105).

Almost surely, 2^55045390 is an apocalyptic number.

55045390 is a deficient number, since it is larger than the sum of its proper divisors (45253130).

55045390 is a wasteful number, since it uses less digits than its factorization.

55045390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 55045390 is about 7419.2580491583. The cubic root of 55045390 is about 380.3998330754.

The spelling of 55045390 in words is "fifty-five million, forty-five thousand, three hundred ninety".