55145323100381 has 2 divisors, whose sum is σ = 55145323100382. Its totient is φ = 55145323100380.

The previous prime is 55145323100359. The next prime is 55145323100443. The reversal of 55145323100381 is 18300132354155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33397603832356 + 21747719268025 = 5779066^2 + 4663445^2 .

It is a cyclic number.

It is not a de Polignac number, because 55145323100381 - 2¹⁸ = 55145322838237 is a prime.

It is a super-2 number, since 2×55145323100381² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55145323109381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27572661550190 + 27572661550191.

It is an arithmetic number, because the mean of its divisors is an integer number (27572661550191).

Almost surely, 2^{55145323100381} is an apocalyptic number.

It is an amenable number.

55145323100381 is a deficient number, since it is larger than the sum of its proper divisors (1).

55145323100381 is an equidigital number, since it uses as much as digits as its factorization.

55145323100381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 55145323100381 in words is "fifty-five trillion, one hundred forty-five billion, three hundred twenty-three million, one hundred thousand, three hundred eighty-one".