55307811 has 16 divisors (see below), whose sum is σ = 81355680. Its totient is φ = 33204480.

The previous prime is 55307809. The next prime is 55307831. The reversal of 55307811 is 11870355.

It is not a de Polignac number, because 55307811 - 2¹ = 55307809 is a prime.

It is a super-2 number, since 2×55307811² = 6117907915223442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55307831) 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, 15696 + ... + 18893.

It is an arithmetic number, because the mean of its divisors is an integer number (5084730).

Almost surely, 2^55307811 is an apocalyptic number.

55307811 is a deficient number, since it is larger than the sum of its proper divisors (26047869).

55307811 is a wasteful number, since it uses less digits than its factorization.

55307811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34646.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 55307811 is about 7436.9221456191. The cubic root of 55307811 is about 381.0033755324.

The spelling of 55307811 in words is "fifty-five million, three hundred seven thousand, eight hundred eleven".