55451906 has 4 divisors (see below), whose sum is σ = 83177862. Its totient is φ = 27725952.

The previous prime is 55451843. The next prime is 55451911. The reversal of 55451906 is 60915455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34703881 + 20748025 = 5891^2 + 4555^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13862975 + ... + 13862978.

Almost surely, 2^55451906 is an apocalyptic number.

55451906 is a deficient number, since it is larger than the sum of its proper divisors (27725956).

55451906 is a wasteful number, since it uses less digits than its factorization.

55451906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27725955.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 55451906 is about 7446.6036553586. The cubic root of 55451906 is about 381.3339682112. Note that the first 3 decimals are identical.

The spelling of 55451906 in words is "fifty-five million, four hundred fifty-one thousand, nine hundred six".