221513700 has 36 divisors (see below), whose sum is σ = 640913840. Its totient is φ = 59070240.

The previous prime is 221513657. The next prime is 221513729. The reversal of 221513700 is 7315122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 368890 + ... + 369489.

Almost surely, 2^221513700 is an apocalyptic number.

221513700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221513700 is an abundant number, since it is smaller than the sum of its proper divisors (419400140).

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

221513700 is a wasteful number, since it uses less digits than its factorization.

221513700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738396 (or 738389 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 221513700 is about 14883.3363195219. The cubic root of 221513700 is about 605.0624437517.

Adding to 221513700 its reverse (7315122), we get a palindrome (228828822).

The spelling of 221513700 in words is "two hundred twenty-one million, five hundred thirteen thousand, seven hundred".