91887255 has 48 divisors (see below), whose sum is σ = 165734400. Its totient is φ = 47044800.

The previous prime is 91887253. The next prime is 91887269. The reversal of 91887255 is 55278819.

It is a happy number.

It is not a de Polignac number, because 91887255 - 2¹ = 91887253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 91887255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91887251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277440 + ... + 277770.

It is an arithmetic number, because the mean of its divisors is an integer number (3452800).

Almost surely, 2^91887255 is an apocalyptic number.

91887255 is a deficient number, since it is larger than the sum of its proper divisors (73847145).

91887255 is a wasteful number, since it uses less digits than its factorization.

91887255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 569 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 91887255 is about 9585.7840054948. The cubic root of 91887255 is about 451.2512582997.

The spelling of 91887255 in words is "ninety-one million, eight hundred eighty-seven thousand, two hundred fifty-five".