55638307 has 2 divisors, whose sum is σ = 55638308. Its totient is φ = 55638306.

The previous prime is 55638299. The next prime is 55638313. The reversal of 55638307 is 70383655.

55638307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55638307 - 2³ = 55638299 is a prime.

It is not a weakly prime, because it can be changed into another prime (55638347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27819153 + 27819154.

It is an arithmetic number, because the mean of its divisors is an integer number (27819154).

Almost surely, 2^55638307 is an apocalyptic number.

55638307 is a deficient number, since it is larger than the sum of its proper divisors (1).

55638307 is an equidigital number, since it uses as much as digits as its factorization.

55638307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 55638307 is about 7459.1089950476. The cubic root of 55638307 is about 381.7607737110.

It can be divided in two parts, 55638 and 307, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 55638307 in words is "fifty-five million, six hundred thirty-eight thousand, three hundred seven".