55505501 has 4 divisors (see below), whose sum is σ = 56024352. Its totient is φ = 54986652.

The previous prime is 55505497. The next prime is 55505519. The reversal of 55505501 is 10550555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55505501 - 2² = 55505497 is a prime.

It is a super-2 number, since 2×55505501² = 6161721282522002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259265 + ... + 259478.

It is an arithmetic number, because the mean of its divisors is an integer number (14006088).

Almost surely, 2^55505501 is an apocalyptic number.

It is an amenable number.

55505501 is a deficient number, since it is larger than the sum of its proper divisors (518851).

55505501 is a wasteful number, since it uses less digits than its factorization.

55505501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518850.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 55505501 is about 7450.2014066735. The cubic root of 55505501 is about 381.4567834255.

The spelling of 55505501 in words is "fifty-five million, five hundred five thousand, five hundred one".