55285311 has 4 divisors (see below), whose sum is σ = 73713752. Its totient is φ = 36856872.

The previous prime is 55285283. The next prime is 55285361. The reversal of 55285311 is 11358255.

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

It is a de Polignac number, because none of the positive numbers 2^k-55285311 is a prime.

It is a super-2 number, since 2×55285311² = 6112931224733442, 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 (55285361) 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, 9214216 + ... + 9214221.

It is an arithmetic number, because the mean of its divisors is an integer number (18428438).

Almost surely, 2^55285311 is an apocalyptic number.

55285311 is a deficient number, since it is larger than the sum of its proper divisors (18428441).

55285311 is a wasteful number, since it uses less digits than its factorization.

55285311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428440.

The product of its digits is 6000, while the sum is 30.

The square root of 55285311 is about 7435.4092691660. The cubic root of 55285311 is about 380.9517026702.

The spelling of 55285311 in words is "fifty-five million, two hundred eighty-five thousand, three hundred eleven".