55215301397 has 2 divisors, whose sum is σ = 55215301398. Its totient is φ = 55215301396.

The previous prime is 55215301387. The next prime is 55215301439. The reversal of 55215301397 is 79310351255.

55215301397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54252192241 + 963109156 = 232921^2 + 31034^2 .

It is a cyclic number.

It is not a de Polignac number, because 55215301397 - 2⁴ = 55215301381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55215301357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27607650698 + 27607650699.

It is an arithmetic number, because the mean of its divisors is an integer number (27607650699).

Almost surely, 2^55215301397 is an apocalyptic number.

It is an amenable number.

55215301397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55215301397 is an equidigital number, since it uses as much as digits as its factorization.

55215301397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141750, while the sum is 41.

The spelling of 55215301397 in words is "fifty-five billion, two hundred fifteen million, three hundred one thousand, three hundred ninety-seven".