55380371 has 2 divisors, whose sum is σ = 55380372. Its totient is φ = 55380370.

The previous prime is 55380361. The next prime is 55380397. The reversal of 55380371 is 17308355.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55380371 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (55380301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27690185 + 27690186.

It is an arithmetic number, because the mean of its divisors is an integer number (27690186).

Almost surely, 2^55380371 is an apocalyptic number.

55380371 is a deficient number, since it is larger than the sum of its proper divisors (1).

55380371 is an equidigital number, since it uses as much as digits as its factorization.

55380371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 55380371 is about 7441.7989088661. The cubic root of 55380371 is about 381.1699193625.

The spelling of 55380371 in words is "fifty-five million, three hundred eighty thousand, three hundred seventy-one".