55537555 has 16 divisors (see below), whose sum is σ = 72476640. Its totient is φ = 40684032.

The previous prime is 55537543. The next prime is 55537567. The reversal of 55537555 is 55573555.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55537543) and next prime (55537567).

It is a cyclic number.

It is not a de Polignac number, because 55537555 - 2¹³ = 55529363 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5685 + ... + 11974.

It is an arithmetic number, because the mean of its divisors is an integer number (4529790).

Almost surely, 2^55537555 is an apocalyptic number.

55537555 is a deficient number, since it is larger than the sum of its proper divisors (16939085).

55537555 is a wasteful number, since it uses less digits than its factorization.

55537555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17718.

The product of its digits is 328125, while the sum is 40.

The square root of 55537555 is about 7452.3523131961. The cubic root of 55537555 is about 381.5301987481.

The spelling of 55537555 in words is "fifty-five million, five hundred thirty-seven thousand, five hundred fifty-five".