221499054 has 48 divisors (see below), whose sum is σ = 552016608. Its totient is φ = 62876736.

The previous prime is 221499043. The next prime is 221499067. The reversal of 221499054 is 450994122.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14184 + ... + 25380.

It is an arithmetic number, because the mean of its divisors is an integer number (11500346).

Almost surely, 2^221499054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221499054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276008304).

221499054 is an abundant number, since it is smaller than the sum of its proper divisors (330517554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221499054 is a wasteful number, since it uses less digits than its factorization.

221499054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11369 (or 11366 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 221499054 is about 14882.8442846117. The cubic root of 221499054 is about 605.0491083239.

The spelling of 221499054 in words is "two hundred twenty-one million, four hundred ninety-nine thousand, fifty-four".