55032009997 has 2 divisors, whose sum is σ = 55032009998. Its totient is φ = 55032009996.

The previous prime is 55032009979. The next prime is 55032010009. The reversal of 55032009997 is 79990023055.

Together with previous prime (55032009979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42246280521 + 12785729476 = 205539^2 + 113074^2 .

It is a cyclic number.

It is not a de Polignac number, because 55032009997 - 2¹⁹ = 55031485709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55032009997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55032004997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27516004998 + 27516004999.

It is an arithmetic number, because the mean of its divisors is an integer number (27516004999).

Almost surely, 2^55032009997 is an apocalyptic number.

It is an amenable number.

55032009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

55032009997 is an equidigital number, since it uses as much as digits as its factorization.

55032009997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 765450, while the sum is 49.

The spelling of 55032009997 in words is "fifty-five billion, thirty-two million, nine thousand, nine hundred ninety-seven".