55561943 has 8 divisors (see below), whose sum is σ = 57431808. Its totient is φ = 53720824.

The previous prime is 55561939. The next prime is 55561949. The reversal of 55561943 is 34916555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55561943 - 2² = 55561939 is a prime.

It is a super-4 number, since 4×55561943⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55561897 and 55561906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3221 + ... + 11022.

It is an arithmetic number, because the mean of its divisors is an integer number (7178976).

Almost surely, 2^55561943 is an apocalyptic number.

55561943 is a deficient number, since it is larger than the sum of its proper divisors (1869865).

55561943 is a wasteful number, since it uses less digits than its factorization.

55561943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14373.

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

The square root of 55561943 is about 7453.9883954833. The cubic root of 55561943 is about 381.5860372213.

The spelling of 55561943 in words is "fifty-five million, five hundred sixty-one thousand, nine hundred forty-three".