55230691 has 2 divisors, whose sum is σ = 55230692. Its totient is φ = 55230690.

The previous prime is 55230683. The next prime is 55230697. The reversal of 55230691 is 19603255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55230691 - 2³ = 55230683 is a prime.

It is not a weakly prime, because it can be changed into another prime (55230697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27615345 + 27615346.

It is an arithmetic number, because the mean of its divisors is an integer number (27615346).

Almost surely, 2^55230691 is an apocalyptic number.

55230691 is a deficient number, since it is larger than the sum of its proper divisors (1).

55230691 is an equidigital number, since it uses as much as digits as its factorization.

55230691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 55230691 is about 7431.7353962584. The cubic root of 55230691 is about 380.8262055729.

The spelling of 55230691 in words is "fifty-five million, two hundred thirty thousand, six hundred ninety-one".