55175987 has 2 divisors, whose sum is σ = 55175988. Its totient is φ = 55175986.

The previous prime is 55175983. The next prime is 55176013. The reversal of 55175987 is 78957155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55175987 - 2² = 55175983 is a prime.

It is not a weakly prime, because it can be changed into another prime (55175983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27587993 + 27587994.

It is an arithmetic number, because the mean of its divisors is an integer number (27587994).

Almost surely, 2^55175987 is an apocalyptic number.

55175987 is a deficient number, since it is larger than the sum of its proper divisors (1).

55175987 is an equidigital number, since it uses as much as digits as its factorization.

55175987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 441000, while the sum is 47.

The square root of 55175987 is about 7428.0540520381. The cubic root of 55175987 is about 380.7004325158.

The spelling of 55175987 in words is "fifty-five million, one hundred seventy-five thousand, nine hundred eighty-seven".