55771427 has 4 divisors (see below), whose sum is σ = 56063616. Its totient is φ = 55479240.

The previous prime is 55771421. The next prime is 55771433. The reversal of 55771427 is 72417755.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55771421) and next prime (55771433).

It is a cyclic number.

It is not a de Polignac number, because 55771427 - 2⁸ = 55771171 is a prime.

It is a super-2 number, since 2×55771427² = 6220904139232658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55771421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145808 + ... + 146189.

It is an arithmetic number, because the mean of its divisors is an integer number (14015904).

Almost surely, 2^55771427 is an apocalyptic number.

55771427 is a deficient number, since it is larger than the sum of its proper divisors (292189).

55771427 is a wasteful number, since it uses less digits than its factorization.

55771427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292188.

The product of its digits is 68600, while the sum is 38.

The square root of 55771427 is about 7468.0269817402. The cubic root of 55771427 is about 382.0649976660.

The spelling of 55771427 in words is "fifty-five million, seven hundred seventy-one thousand, four hundred twenty-seven".