55551506 has 4 divisors (see below), whose sum is σ = 83327262. Its totient is φ = 27775752.

The previous prime is 55551493. The next prime is 55551547. The reversal of 55551506 is 60515555.

55551506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 38254225 + 17297281 = 6185^2 + 4159^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13887875 + ... + 13887878.

Almost surely, 2^55551506 is an apocalyptic number.

55551506 is a deficient number, since it is larger than the sum of its proper divisors (27775756).

55551506 is a wasteful number, since it uses less digits than its factorization.

55551506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27775755.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 55551506 is about 7453.2882676038. The cubic root of 55551506 is about 381.5621427913.

The spelling of 55551506 in words is "fifty-five million, five hundred fifty-one thousand, five hundred six".