221134487 has 16 divisors (see below), whose sum is σ = 268038720. Its totient is φ = 178096128.

The previous prime is 221134481. The next prime is 221134499. The reversal of 221134487 is 784431122.

It is not a de Polignac number, because 221134487 - 2²⁴ = 204357271 is a prime.

It is a super-2 number, since 2×221134487² = 97800922681506338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221134481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95123 + ... + 97419.

It is an arithmetic number, because the mean of its divisors is an integer number (16752420).

Almost surely, 2^221134487 is an apocalyptic number.

221134487 is a deficient number, since it is larger than the sum of its proper divisors (46904233).

221134487 is a wasteful number, since it uses less digits than its factorization.

221134487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130.

The product of its digits is 10752, while the sum is 32.

The square root of 221134487 is about 14870.5913466815. The cubic root of 221134487 is about 604.7169743732.

The spelling of 221134487 in words is "two hundred twenty-one million, one hundred thirty-four thousand, four hundred eighty-seven".