55020311 has 2 divisors, whose sum is σ = 55020312. Its totient is φ = 55020310.

The previous prime is 55020299. The next prime is 55020373. The reversal of 55020311 is 11302055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55020311 - 2¹⁰ = 55019287 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55020311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55022311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27510155 + 27510156.

It is an arithmetic number, because the mean of its divisors is an integer number (27510156).

Almost surely, 2^55020311 is an apocalyptic number.

55020311 is a deficient number, since it is larger than the sum of its proper divisors (1).

55020311 is an equidigital number, since it uses as much as digits as its factorization.

55020311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 55020311 is about 7417.5677280359. The cubic root of 55020311 is about 380.3420535071.

Adding to 55020311 its reverse (11302055), we get a palindrome (66322366).

The spelling of 55020311 in words is "fifty-five million, twenty thousand, three hundred eleven".