55782149 has 2 divisors, whose sum is σ = 55782150. Its totient is φ = 55782148.

The previous prime is 55782143. The next prime is 55782161. The reversal of 55782149 is 94128755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54493924 + 1288225 = 7382^2 + 1135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55782149 is a prime.

It is a super-2 number, since 2×55782149² = 6223296294116402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55782143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27891074 + 27891075.

It is an arithmetic number, because the mean of its divisors is an integer number (27891075).

Almost surely, 2^55782149 is an apocalyptic number.

It is an amenable number.

55782149 is a deficient number, since it is larger than the sum of its proper divisors (1).

55782149 is an equidigital number, since it uses as much as digits as its factorization.

55782149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 55782149 is about 7468.7448075296. The cubic root of 55782149 is about 382.0894799659.

The spelling of 55782149 in words is "fifty-five million, seven hundred eighty-two thousand, one hundred forty-nine".