55405432 has 32 divisors (see below), whose sum is σ = 109872000. Its totient is φ = 26150400.

The previous prime is 55405417. The next prime is 55405447. The reversal of 55405432 is 23450455.

It is an interprime number because it is at equal distance from previous prime (55405417) and next prime (55405447).

It is a self number, because there is not a number n which added to its sum of digits gives 55405432.

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, 7444 + ... + 12892.

It is an arithmetic number, because the mean of its divisors is an integer number (3433500).

Almost surely, 2^55405432 is an apocalyptic number.

It is an amenable number.

55405432 is a deficient number, since it is larger than the sum of its proper divisors (54466568).

55405432 is a wasteful number, since it uses less digits than its factorization.

55405432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527 (or 5523 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55405432 is about 7443.4825182840. The cubic root of 55405432 is about 381.2274069923.

Adding to 55405432 its reverse (23450455), we get a palindrome (78855887).

The spelling of 55405432 in words is "fifty-five million, four hundred five thousand, four hundred thirty-two".