55552993 has 2 divisors, whose sum is σ = 55552994. Its totient is φ = 55552992.

The previous prime is 55552969. The next prime is 55553053. The reversal of 55552993 is 39925555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44182609 + 11370384 = 6647^2 + 3372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55552993 is a prime.

It is a super-2 number, since 2×55552993² = 6172270062516098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55552933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27776496 + 27776497.

It is an arithmetic number, because the mean of its divisors is an integer number (27776497).

Almost surely, 2^55552993 is an apocalyptic number.

It is an amenable number.

55552993 is a deficient number, since it is larger than the sum of its proper divisors (1).

55552993 is an equidigital number, since it uses as much as digits as its factorization.

55552993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 303750, while the sum is 43.

The square root of 55552993 is about 7453.3880215644. The cubic root of 55552993 is about 381.5655473066.

The spelling of 55552993 in words is "fifty-five million, five hundred fifty-two thousand, nine hundred ninety-three".