55211995 has 4 divisors (see below), whose sum is σ = 66254400. Its totient is φ = 44169592.

The previous prime is 55211987. The next prime is 55211999. The reversal of 55211995 is 59911255.

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

It is a cyclic number.

It is not a de Polignac number, because 55211995 - 2³ = 55211987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55211999) 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, 5521195 + ... + 5521204.

It is an arithmetic number, because the mean of its divisors is an integer number (16563600).

Almost surely, 2^55211995 is an apocalyptic number.

55211995 is a deficient number, since it is larger than the sum of its proper divisors (11042405).

55211995 is a wasteful number, since it uses less digits than its factorization.

55211995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042404.

The product of its digits is 20250, while the sum is 37.

The square root of 55211995 is about 7430.4774409186. The cubic root of 55211995 is about 380.7832298883.

The spelling of 55211995 in words is "fifty-five million, two hundred eleven thousand, nine hundred ninety-five".