55578527 has 2 divisors, whose sum is σ = 55578528. Its totient is φ = 55578526.

The previous prime is 55578521. The next prime is 55578539. The reversal of 55578527 is 72587555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55578527 - 2⁶ = 55578463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55578521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27789263 + 27789264.

It is an arithmetic number, because the mean of its divisors is an integer number (27789264).

Almost surely, 2^55578527 is an apocalyptic number.

55578527 is a deficient number, since it is larger than the sum of its proper divisors (1).

55578527 is an equidigital number, since it uses as much as digits as its factorization.

55578527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 490000, while the sum is 44.

The square root of 55578527 is about 7455.1007370793. The cubic root of 55578527 is about 381.6239984168.

Subtracting 55578527 from its reverse (72587555), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 55578527 in words is "fifty-five million, five hundred seventy-eight thousand, five hundred twenty-seven".