55587031 has 2 divisors, whose sum is σ = 55587032. Its totient is φ = 55587030.

The previous prime is 55587029. The next prime is 55587047. The reversal of 55587031 is 13078555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55587031 - 2¹ = 55587029 is a prime.

It is a super-2 number, since 2×55587031² = 6179836030789922, which contains 22 as substring.

Together with 55587029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55587731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27793515 + 27793516.

It is an arithmetic number, because the mean of its divisors is an integer number (27793516).

Almost surely, 2^55587031 is an apocalyptic number.

55587031 is a deficient number, since it is larger than the sum of its proper divisors (1).

55587031 is an equidigital number, since it uses as much as digits as its factorization.

55587031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 55587031 is about 7455.6710630231. The cubic root of 55587031 is about 381.6434613589.

The spelling of 55587031 in words is "fifty-five million, five hundred eighty-seven thousand, thirty-one".