55915087 has 2 divisors, whose sum is σ = 55915088. Its totient is φ = 55915086.

The previous prime is 55915073. The next prime is 55915099. The reversal of 55915087 is 78051955.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55915087 - 2¹⁵ = 55882319 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 (55915487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27957543 + 27957544.

It is an arithmetic number, because the mean of its divisors is an integer number (27957544).

Almost surely, 2^55915087 is an apocalyptic number.

55915087 is a deficient number, since it is larger than the sum of its proper divisors (1).

55915087 is an equidigital number, since it uses as much as digits as its factorization.

55915087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 55915087 is about 7477.6391327745. The cubic root of 55915087 is about 382.3927664427.

The spelling of 55915087 in words is "fifty-five million, nine hundred fifteen thousand, eighty-seven".