55494621 has 24 divisors (see below), whose sum is σ = 98658560. Its totient is φ = 29271456.

The previous prime is 55494617. The next prime is 55494623. The reversal of 55494621 is 12649455.

It is not a de Polignac number, because 55494621 - 2² = 55494617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55494623) 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 23 ways as a sum of consecutive naturals, for example, 33061 + ... + 34698.

Almost surely, 2^55494621 is an apocalyptic number.

It is an amenable number.

55494621 is a deficient number, since it is larger than the sum of its proper divisors (43163939).

55494621 is a wasteful number, since it uses less digits than its factorization.

55494621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67785 (or 67782 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 55494621 is about 7449.4711892859. The cubic root of 55494621 is about 381.4318578420.

The spelling of 55494621 in words is "fifty-five million, four hundred ninety-four thousand, six hundred twenty-one".