55105599 has 8 divisors (see below), whose sum is σ = 75266352. Its totient is φ = 35840960.

The previous prime is 55105591. The next prime is 55105613. The reversal of 55105599 is 99550155.

It is a happy number.

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 55105599 - 2³ = 55105591 is a prime.

It is a super-2 number, since 2×55105599² = 6073254082297602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105591) 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, 223884 + ... + 224129.

It is an arithmetic number, because the mean of its divisors is an integer number (9408294).

Almost surely, 2^55105599 is an apocalyptic number.

55105599 is a deficient number, since it is larger than the sum of its proper divisors (20160753).

55105599 is a wasteful number, since it uses less digits than its factorization.

55105599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448057.

The product of its (nonzero) digits is 50625, while the sum is 39.

The square root of 55105599 is about 7423.3145561804. The cubic root of 55105599 is about 380.5384771288.

The spelling of 55105599 in words is "fifty-five million, one hundred five thousand, five hundred ninety-nine".