55421516 has 6 divisors (see below), whose sum is σ = 96987660. Its totient is φ = 27710756.

The previous prime is 55421503. The next prime is 55421533. The reversal of 55421516 is 61512455.

It is a happy number.

55421516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 6927686 + ... + 6927693.

It is an arithmetic number, because the mean of its divisors is an integer number (16164610).

Almost surely, 2^55421516 is an apocalyptic number.

It is an amenable number.

55421516 is a deficient number, since it is larger than the sum of its proper divisors (41566144).

55421516 is a wasteful number, since it uses less digits than its factorization.

55421516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13855383 (or 13855381 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 55421516 is about 7444.5628481463. The cubic root of 55421516 is about 381.2642930770.

The spelling of 55421516 in words is "fifty-five million, four hundred twenty-one thousand, five hundred sixteen".