55438651 has 4 divisors (see below), whose sum is σ = 55577304. Its totient is φ = 55300000.

The previous prime is 55438589. The next prime is 55438661. The reversal of 55438651 is 15683455.

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

It is a cyclic number.

It is not a de Polignac number, because 55438651 - 2²¹ = 53341499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55438651.

It is not an unprimeable number, because it can be changed into a prime (55438661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68725 + ... + 69526.

It is an arithmetic number, because the mean of its divisors is an integer number (13894326).

Almost surely, 2^55438651 is an apocalyptic number.

55438651 is a deficient number, since it is larger than the sum of its proper divisors (138653).

55438651 is a wasteful number, since it uses less digits than its factorization.

55438651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138652.

The product of its digits is 72000, while the sum is 37.

The square root of 55438651 is about 7445.7135991119. The cubic root of 55438651 is about 381.3035816119.

The spelling of 55438651 in words is "fifty-five million, four hundred thirty-eight thousand, six hundred fifty-one".