55433311397 has 2 divisors, whose sum is σ = 55433311398. Its totient is φ = 55433311396.

The previous prime is 55433311393. The next prime is 55433311457. The reversal of 55433311397 is 79311333455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51511295521 + 3922015876 = 226961^2 + 62626^2 .

It is a cyclic number.

It is not a de Polignac number, because 55433311397 - 2² = 55433311393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55433311393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27716655698 + 27716655699.

It is an arithmetic number, because the mean of its divisors is an integer number (27716655699).

Almost surely, 2^55433311397 is an apocalyptic number.

It is an amenable number.

55433311397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55433311397 is an equidigital number, since it uses as much as digits as its factorization.

55433311397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 44.

The spelling of 55433311397 in words is "fifty-five billion, four hundred thirty-three million, three hundred eleven thousand, three hundred ninety-seven".