55403011 has 2 divisors, whose sum is σ = 55403012. Its totient is φ = 55403010.

The previous prime is 55403009. The next prime is 55403027. The reversal of 55403011 is 11030455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55403011 - 2¹ = 55403009 is a prime.

It is a super-2 number, since 2×55403011² = 6138987255732242, which contains 22 as substring.

Together with 55403009, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55403011.

It is not a weakly prime, because it can be changed into another prime (55403071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27701505 + 27701506.

It is an arithmetic number, because the mean of its divisors is an integer number (27701506).

Almost surely, 2^55403011 is an apocalyptic number.

55403011 is a deficient number, since it is larger than the sum of its proper divisors (1).

55403011 is an equidigital number, since it uses as much as digits as its factorization.

55403011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55403011 is about 7443.3198910164. The cubic root of 55403011 is about 381.2218541974.

Adding to 55403011 its reverse (11030455), we get a palindrome (66433466).

The spelling of 55403011 in words is "fifty-five million, four hundred three thousand, eleven".