55265381 has 2 divisors, whose sum is σ = 55265382. Its totient is φ = 55265380.

The previous prime is 55265341. The next prime is 55265407. The reversal of 55265381 is 18356255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54893281 + 372100 = 7409^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 55265381 - 2¹⁰ = 55264357 is a prime.

It is a super-2 number, since 2×55265381² = 6108524674150322, 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 (55265311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27632690 + 27632691.

It is an arithmetic number, because the mean of its divisors is an integer number (27632691).

Almost surely, 2^55265381 is an apocalyptic number.

It is an amenable number.

55265381 is a deficient number, since it is larger than the sum of its proper divisors (1).

55265381 is an equidigital number, since it uses as much as digits as its factorization.

55265381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The square root of 55265381 is about 7434.0689396857. The cubic root of 55265381 is about 380.9059202866.

The spelling of 55265381 in words is "fifty-five million, two hundred sixty-five thousand, three hundred eighty-one".