55466381 has 2 divisors, whose sum is σ = 55466382. Its totient is φ = 55466380.

The previous prime is 55466353. The next prime is 55466401. The reversal of 55466381 is 18366455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53421481 + 2044900 = 7309^2 + 1430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55466381 is a prime.

It is a super-2 number, since 2×55466381² = 6153038842474322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55466581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27733190 + 27733191.

It is an arithmetic number, because the mean of its divisors is an integer number (27733191).

Almost surely, 2^55466381 is an apocalyptic number.

It is an amenable number.

55466381 is a deficient number, since it is larger than the sum of its proper divisors (1).

55466381 is an equidigital number, since it uses as much as digits as its factorization.

55466381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The square root of 55466381 is about 7447.5755115339. The cubic root of 55466381 is about 381.3671460847.

The spelling of 55466381 in words is "fifty-five million, four hundred sixty-six thousand, three hundred eighty-one".