55507433 has 2 divisors, whose sum is σ = 55507434. Its totient is φ = 55507432.

The previous prime is 55507429. The next prime is 55507471. The reversal of 55507433 is 33470555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44729344 + 10778089 = 6688^2 + 3283^2 .

It is a cyclic number.

It is not a de Polignac number, because 55507433 - 2² = 55507429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55507433.

It is not a weakly prime, because it can be changed into another prime (55507633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27753716 + 27753717.

It is an arithmetic number, because the mean of its divisors is an integer number (27753717).

Almost surely, 2^55507433 is an apocalyptic number.

It is an amenable number.

55507433 is a deficient number, since it is larger than the sum of its proper divisors (1).

55507433 is an equidigital number, since it uses as much as digits as its factorization.

55507433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 32.

The square root of 55507433 is about 7450.3310664695. The cubic root of 55507433 is about 381.4612092088.

Adding to 55507433 its reverse (33470555), we get a palindrome (88977988).

The spelling of 55507433 in words is "fifty-five million, five hundred seven thousand, four hundred thirty-three".