55451903 has 8 divisors (see below), whose sum is σ = 59977008. Its totient is φ = 50963904.

The previous prime is 55451843. The next prime is 55451911. The reversal of 55451903 is 30915455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55451903 - 2⁸ = 55451647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55451903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55451933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6125 + ... + 12182.

It is an arithmetic number, because the mean of its divisors is an integer number (7497126).

Almost surely, 2^55451903 is an apocalyptic number.

55451903 is a deficient number, since it is larger than the sum of its proper divisors (4525105).

55451903 is a wasteful number, since it uses less digits than its factorization.

55451903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18553.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 55451903 is about 7446.6034539245. The cubic root of 55451903 is about 381.3339613343. Note that the first 3 decimals are identical.

The spelling of 55451903 in words is "fifty-five million, four hundred fifty-one thousand, nine hundred three".