55186487 has 2 divisors, whose sum is σ = 55186488. Its totient is φ = 55186486.

The previous prime is 55186463. The next prime is 55186511. The reversal of 55186487 is 78468155.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (55186463) and next prime (55186511).

It is a cyclic number.

It is not a de Polignac number, because 55186487 - 2²⁴ = 38409271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55186447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27593243 + 27593244.

It is an arithmetic number, because the mean of its divisors is an integer number (27593244).

Almost surely, 2^55186487 is an apocalyptic number.

55186487 is a deficient number, since it is larger than the sum of its proper divisors (1).

55186487 is an equidigital number, since it uses as much as digits as its factorization.

55186487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 44.

The square root of 55186487 is about 7428.7607984105. The cubic root of 55186487 is about 380.7245801038.

The spelling of 55186487 in words is "fifty-five million, one hundred eighty-six thousand, four hundred eighty-seven".