55077427 has 2 divisors, whose sum is σ = 55077428. Its totient is φ = 55077426.

The previous prime is 55077397. The next prime is 55077431. The reversal of 55077427 is 72477055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55077427 - 2¹⁵ = 55044659 is a prime.

It is equal to p_3286594 and since 55077427 and 3286594 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (55077527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27538713 + 27538714.

It is an arithmetic number, because the mean of its divisors is an integer number (27538714).

Almost surely, 2^55077427 is an apocalyptic number.

55077427 is a deficient number, since it is larger than the sum of its proper divisors (1).

55077427 is an equidigital number, since it uses as much as digits as its factorization.

55077427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 55077427 is about 7421.4167784864. The cubic root of 55077427 is about 380.4736176735.

It can be divided in two parts, 550 and 77427, that added together give a palindrome (77977).

The spelling of 55077427 in words is "fifty-five million, seventy-seven thousand, four hundred twenty-seven".