55099805 has 16 divisors (see below), whose sum is σ = 71202240. Its totient is φ = 40780032.

The previous prime is 55099801. The next prime is 55099831. The reversal of 55099805 is 50899055.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55099805 - 2² = 55099801 is a prime.

It is a super-2 number, since 2×55099805² = 6071977022076050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55099801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479 + ... + 10508.

It is an arithmetic number, because the mean of its divisors is an integer number (4450140).

Almost surely, 2^55099805 is an apocalyptic number.

It is an amenable number.

55099805 is a deficient number, since it is larger than the sum of its proper divisors (16102435).

55099805 is a wasteful number, since it uses less digits than its factorization.

55099805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068.

The product of its (nonzero) digits is 81000, while the sum is 41.

The square root of 55099805 is about 7422.9242889848. The cubic root of 55099805 is about 380.5251396019.

The spelling of 55099805 in words is "fifty-five million, ninety-nine thousand, eight hundred five".