55891567 has 2 divisors, whose sum is σ = 55891568. Its totient is φ = 55891566.

The previous prime is 55891523. The next prime is 55891639. The reversal of 55891567 is 76519855.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55891567 is a prime.

It is a super-3 number, since 3×55891567³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55891267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27945783 + 27945784.

It is an arithmetic number, because the mean of its divisors is an integer number (27945784).

Almost surely, 2^55891567 is an apocalyptic number.

55891567 is a deficient number, since it is larger than the sum of its proper divisors (1).

55891567 is an equidigital number, since it uses as much as digits as its factorization.

55891567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 46.

The square root of 55891567 is about 7476.0662784649. The cubic root of 55891567 is about 382.3391426374.

The spelling of 55891567 in words is "fifty-five million, eight hundred ninety-one thousand, five hundred sixty-seven".