55563830 has 16 divisors (see below), whose sum is σ = 114302880. Its totient is φ = 19050432.

The previous prime is 55563821. The next prime is 55563853. The reversal of 55563830 is 3836555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396815 + ... + 396954.

It is an arithmetic number, because the mean of its divisors is an integer number (7143930).

Almost surely, 2^55563830 is an apocalyptic number.

55563830 is an abundant number, since it is smaller than the sum of its proper divisors (58739050).

55563830 is a wasteful number, since it uses less digits than its factorization.

55563830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793783.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 55563830 is about 7454.1149709405. The cubic root of 55563830 is about 381.5903569928.

The spelling of 55563830 in words is "fifty-five million, five hundred sixty-three thousand, eight hundred thirty".