55643450 has 24 divisors (see below), whose sum is σ = 106838400. Its totient is φ = 21538800.

The previous prime is 55643387. The next prime is 55643453. The reversal of 55643450 is 5434655.

It is not an unprimeable number, because it can be changed into a prime (55643453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16400 + ... + 19499.

It is an arithmetic number, because the mean of its divisors is an integer number (4451600).

Almost surely, 2^55643450 is an apocalyptic number.

55643450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55643450 is a deficient number, since it is larger than the sum of its proper divisors (51194950).

55643450 is a wasteful number, since it uses less digits than its factorization.

55643450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35942 (or 35937 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 55643450 is about 7459.4537333507. The cubic root of 55643450 is about 381.7725362015.

The spelling of 55643450 in words is "fifty-five million, six hundred forty-three thousand, four hundred fifty".