55068821 has 4 divisors (see below), whose sum is σ = 57967200. Its totient is φ = 52170444.

The previous prime is 55068817. The next prime is 55068823. The reversal of 55068821 is 12886055.

It is a happy number.

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 55068821 - 2² = 55068817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55068823) 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, 1449161 + ... + 1449198.

It is an arithmetic number, because the mean of its divisors is an integer number (14491800).

Almost surely, 2^55068821 is an apocalyptic number.

It is an amenable number.

55068821 is a deficient number, since it is larger than the sum of its proper divisors (2898379).

55068821 is a wasteful number, since it uses less digits than its factorization.

55068821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898378.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 55068821 is about 7420.8369474069. The cubic root of 55068821 is about 380.4537999569.

The spelling of 55068821 in words is "fifty-five million, sixty-eight thousand, eight hundred twenty-one".