55654391 has 4 divisors (see below), whose sum is σ = 59935512. Its totient is φ = 51373272.

The previous prime is 55654381. The next prime is 55654409. The reversal of 55654391 is 19345655.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55654391 is a prime.

It is a super-2 number, since 2×55654391² = 6194822475161762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55654301) 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, 2140541 + ... + 2140566.

It is an arithmetic number, because the mean of its divisors is an integer number (14983878).

Almost surely, 2^55654391 is an apocalyptic number.

55654391 is a deficient number, since it is larger than the sum of its proper divisors (4281121).

55654391 is a wasteful number, since it uses less digits than its factorization.

55654391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281120.

The product of its digits is 81000, while the sum is 38.

The square root of 55654391 is about 7460.1870619978. The cubic root of 55654391 is about 381.7975568138.

The spelling of 55654391 in words is "fifty-five million, six hundred fifty-four thousand, three hundred ninety-one".